WO2017206053A1 - Lens driving apparatus, camera module, and camera holding apparatus - Google Patents

Lens driving apparatus, camera module, and camera holding apparatus Download PDF

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Publication number
WO2017206053A1
WO2017206053A1 PCT/CN2016/084036 CN2016084036W WO2017206053A1 WO 2017206053 A1 WO2017206053 A1 WO 2017206053A1 CN 2016084036 W CN2016084036 W CN 2016084036W WO 2017206053 A1 WO2017206053 A1 WO 2017206053A1
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WO
WIPO (PCT)
Prior art keywords
shake correction
autofocus
ois
coil
magnet
Prior art date
Application number
PCT/CN2016/084036
Other languages
French (fr)
Chinese (zh)
Inventor
菅原正吉
Original Assignee
三美电机株式会社
菅原正吉
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三美电机株式会社, 菅原正吉 filed Critical 三美电机株式会社
Priority to KR1020187038012A priority Critical patent/KR102510364B1/en
Priority to US16/306,049 priority patent/US10802376B2/en
Priority to JP2018555906A priority patent/JP6853487B2/en
Priority to CN201680086205.3A priority patent/CN109313373B/en
Priority to PCT/CN2016/084036 priority patent/WO2017206053A1/en
Publication of WO2017206053A1 publication Critical patent/WO2017206053A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/04—Focusing arrangements of general interest for cameras, projectors or printers adjusting position of image plane without moving lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/02—Lateral adjustment of lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/04—Vertical adjustment of lens; Rising fronts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements

Definitions

  • the present invention relates to a lens driving device for shake correction, a camera module having a shake correction function, and a camera mounting device.
  • a small camera module is mounted on a portable terminal such as a smartphone.
  • an auto focus function hereinafter referred to as "AF function”, AF: Auto Focus
  • AF Auto Focus
  • a lens driving device of a blurring shake correction function hereinafter referred to as "OIS function”, OIS: Optical Image Stabilization
  • the lens driving device having the autofocus function and the shake correction function includes an autofocus driving unit (hereinafter referred to as an "AF driving unit”) for moving the lens portion in the optical axis direction, and a lens portion for the light portion.
  • AF driving unit autofocus driving unit
  • OIS drive unit shake correction drive unit
  • the AF drive unit includes, for example, an autofocus coil unit (hereinafter referred to as an "AF coil portion”) disposed around the lens portion, and an autofocus magnet portion (hereinafter referred to as “AF magnet portion”), relative to the AF.
  • the coil portion is disposed to be spaced apart from each other in the radial direction; and the elastic support portion (for example, a leaf spring) is elastically supported to include the lens portion with respect to, for example, an autofocus fixing portion (hereinafter referred to as an "AF fixing portion”) including the AF magnet portion.
  • AF fixing portion an autofocus fixing portion
  • AF movable portion an autofocus movable portion of the AF coil portion.
  • the AF movable portion By the driving force of the voice coil motor including the AF coil portion and the AF magnet portion, the AF movable portion is moved in the optical axis direction with respect to the AF fixing portion, and the focus is automatically performed.
  • the AF fixing portion includes the AF coil portion
  • the AF movable portion includes the AF magnet portion.
  • the OIS drive unit includes, for example, a shake correction magnet unit (hereinafter referred to as “OIS magnet unit”), and is disposed in the AF drive unit and the shake correction coil unit (hereinafter referred to as “OIS coil unit”).
  • the OIS is arranged to be spaced apart by the magnet portion, and the support portion is provided with the AF drive unit and the OIS magnet for the shake correction fixing portion (hereinafter referred to as "OIS fixing portion”) including the OIS coil portion.
  • the shake correction movable portion of the portion hereinafter referred to as "OIS movable portion").
  • the OIS movable portion is swung with respect to the OIS fixing portion in a plane orthogonal to the optical axis direction by the driving force of the voice coil motor composed of the OIS magnet portion and the OIS coil portion, thereby performing shake correction (so-called cylinder Displacement mode).
  • the OIS magnet portion can also serve as the AF magnet portion.
  • the lens driving device can be reduced in size and height.
  • a suspension wire can be used as the support portion that supports the OIS movable portion with respect to the OIS fixing portion.
  • Patent Document 1 Japanese Patent Laid-Open Publication No. 2013-24938
  • the wire diameter of the hanging wire is as fine as possible.
  • the wire diameter of the suspension wire is reduced, the risk of breakage due to an impact such as a drop increases.
  • the suspension wire is easily bent and the OIS movable portion cannot move in parallel (the lens portion is inclined), the inclination characteristic at the time of shake correction is lowered.
  • the tilt characteristic is an index indicating the parallelism of the OIS movable portion at the time of shake correction, and is expressed by the tilt angle of the lens portion accompanying the movement of the OIS movable portion.
  • the AF movable portion is sandwiched by the leaf spring, the number of components is large, the structure is complicated, and complicated assembly work is required.
  • An object of the present invention is to provide a lens driving device that can ensure high reliability while improving OIS sensitivity, and that can simplify assembly work, a camera module including the lens driving device, and a camera mounting device.
  • a lens driving device includes a shake correction drive unit including a shake correction magnet unit disposed around the lens unit, and a shake correction coil unit for correcting the shake
  • the shake correction support portion supports the shake including the shake correction magnet portion in a state of being spaced apart in the optical axis direction with respect to the shake correction fixing portion including the shake correction coil portion.
  • the driving force of the shake correction voice coil motor including the shake correction coil portion and the shake correction magnet portion is such that the shake correction movable portion is opposed to the plane orthogonal to the optical axis direction.
  • the shake correction fixing portion is swung to perform shake correction;
  • the shake correction movable unit includes an autofocus drive unit including an autofocus coil unit disposed around the lens unit, and an autofocus magnet unit for the autofocus coil. And the autofocus holding portion supports the autofocus movable portion including the autofocus coil portion with respect to the autofocus fixing portion including the autofocus magnet portion, the autofocus holding portion
  • the focus drive unit uses the driving force of the autofocus voice coil motor including the autofocus coil unit and the autofocus magnet unit to cause the autofocus movable portion to be relative to the automatic in the optical axis direction. Focusing the fixed part to move, thereby automatically focusing;
  • the shake correction support portion has a biaxial hinge structure formed of an elastomer material and movably supporting the shake correction movable portion in a plane orthogonal to the optical axis;
  • the autofocus support portion has a support portion body and a reinforcing portion
  • the support body has a fixed end connected to the autofocus fixing portion, a free end connected to the autofocus movable portion, and an arm connecting the fixed end and the free end;
  • the arm is formed of an elastomer material and has two hinge portions having a thickness formed to be thinner than the circumference and oriented in a direction orthogonal to the optical axis direction, and accompanied by the autofocus movable portion toward the optical axis direction Moving, the arm is curved in such a manner that the bending directions at the two hinge portions are opposite to each other;
  • the reinforcing portion is formed of a material having a higher rigidity than the elastomer material, and is disposed between the two hinge portions of the arm.
  • a camera module includes: the lens driving device described above; a lens unit attached to the lens driving device; and an imaging unit that images an image of the subject imaged by the lens portion.
  • a camera mounting device that reflects one aspect of the present invention is a camera mounting device that is an information device or a transportation device, and includes the above-described camera module.
  • the risk of damage to the shake correction support portion and the autofocus support portion due to the impact such as dropping is extremely low.
  • the structure is simple and the number of parts is small.
  • the influence of the resonance received by the autofocus movable portion can be remarkably reduced. Therefore, can It ensures high reliability and improves OIS sensitivity, and it also simplifies assembly work.
  • FIG. 1 is a view showing a smartphone on which a camera module according to an embodiment of the present invention is mounted.
  • FIG. 2 is an external perspective view of a camera module.
  • FIG 3 is an exploded perspective view of the camera module.
  • FIG. 4 is a view showing a lens driving device.
  • Fig. 5 is an exploded perspective view of the lens driving device.
  • Fig. 6 is an exploded perspective view of the OIS movable portion (AF drive unit).
  • FIG. 7 is a view showing a mounted state of the AF support portion and the AF movable portion.
  • FIG. 8 is a perspective view showing a mounted state of the AF support portion and the AF movable portion.
  • Fig. 9 is an exploded perspective view of the OIS fixing portion.
  • FIG. 10 is a view showing a curved form of the OIS support portion (first side support).
  • FIG. 11 is a view showing a curved form of the OIS support portion (second side support).
  • Fig. 12 is a view showing a curved form of an AF support portion (arm).
  • FIG. 13 is a view showing frequency characteristics of the AF position detecting unit.
  • Fig. 14 is a view showing a coil portion for OIS.
  • FIG. 15 is a view showing a relationship between a magnetic flux generated by the OIS coil portion and an XY position detecting unit.
  • FIG. 16 is a view showing a car as a camera mounting device on which an in-vehicle camera module is mounted.
  • AF coil portion autofocus coil portion
  • OIS coil unit shake correction coil unit
  • OIS support unit OIS link member (shake correction support unit)
  • M smart phone (camera carrying device)
  • FIG. 1 is a view showing a smartphone M (camera mounting device) on which a camera module A according to an embodiment of the present invention is mounted.
  • FIG. 1A is a front view of the smartphone M
  • FIG. 1B is a rear view of the smartphone M.
  • the smartphone M is equipped with, for example, a camera module A as a rear camera OC.
  • the camera module A has an auto focus function and a shake correction function to automatically perform focusing when shooting a subject, and corrects shake (vibration) generated during shooting to capture an image without image blur.
  • FIG. 2 is an external perspective view of the camera module A.
  • FIG. 3 is an exploded perspective view of the camera module A.
  • an orthogonal coordinate system (X, Y, Z) will be used for explanation. In the drawings to be described later, the same orthogonal coordinate system (X, Y, Z) is also used.
  • the camera module A is mounted in such a manner that when the smartphone M is actually photographed, the X direction is the up and down direction (or the left and right direction), the Y direction is the left and right direction (or the up and down direction), and the Z direction is the front and rear direction.
  • the Z direction is the optical axis direction
  • the upper side in the figure is the optical axis direction light receiving side (also referred to as “macro position side”)
  • the lower side is the optical axis direction imaging side (also referred to as "infinity position side”).
  • the X direction and the Y direction orthogonal to the optical axis direction are referred to as "optical axis orthogonal directions”.
  • the camera module A includes a lens unit 2 for housing a lens in a cylindrical lens barrel, a lens driving device for AF and OIS, and an imaging unit that images an image of the subject imaged by the lens unit 2 (not shown). ), as well as covering the entire cover 3 and the like.
  • the cover 3 is a covered rectangular tubular body having a square shape in a plan view as seen from the optical axis direction, and has a circular opening 3a on its upper surface.
  • the lens portion 2 faces the outside from the opening 3a.
  • the cover 3 is fixed to the base 23 of the OIS fixing portion 20 (refer to FIG. 5) of the lens driving device 1. Further, the cover 3 may be formed of a material having conductivity and grounded via the OIS fixing portion 20.
  • the imaging unit has an imaging element (not shown) and is disposed on the imaging side of the optical axis direction of the lens driving device 1 , that is, the imaging side of the OIS fixing unit 20 in the optical axis direction.
  • the imaging element (not shown) is configured by, for example, a CCD (charge coupled device) type image sensor, a CMOS (complementary metal oxide semiconductor) type image sensor, or the like.
  • the imaging element (not shown) images the subject image formed by the lens unit 2, and outputs an electrical signal corresponding to the subject image.
  • FIG. 4 is a view showing the lens driving device 1.
  • 4A is a top view
  • FIG. 4B is a front view
  • FIG. 4C is a rear view
  • FIG. 4D is a left side view
  • FIG. 4E is a right side view.
  • the coordinate axes are only shown in FIG. 4A.
  • FIG. 5 is an exploded perspective view of the lens driving device 1.
  • Figure 4, Figure 5 As shown in the figure, the lens driving device 1 includes an OIS movable portion 10, an OIS fixing portion 20, an OIS support portion 30, and the like.
  • the OIS movable portion 10 has an OIS magnet portion that constitutes an OIS voice coil motor, and is a portion that swings in an orthogonal plane of an optical axis orthogonal to the optical axis during shake correction.
  • the OIS fixing portion 20 has an OIS coil portion constituting the OIS voice coil motor, and is a portion that supports the OIS movable portion 10 via the OIS support portion 30.
  • the OIS driving unit in the lens driving device 1 employs a movable magnet method.
  • the OIS movable unit 10 includes an AF drive unit.
  • the OIS movable portion 10 is disposed to be spaced apart from the OIS fixing portion 20 so as to be movable in a plane orthogonal to the optical axis direction.
  • the OIS movable portion 10 is disposed to be spaced apart from the OIS fixing portion 20 toward the light receiving side in the optical axis direction.
  • the OIS fixing portion 20 and the OIS movable portion 10 are coupled to the OIS support portion 30.
  • the OIS support portion 30 is a link member (hereinafter referred to as "the OIS link member 30") that uses an elastic body instead of the conventional suspension wire.
  • the elastomer refers to a rubber-like elastomer comprising a thermosetting elastomer (rubber) and a thermoplastic elastomer (plastic having elasticity).
  • the OIS link member 30 has an upper frame body 33, a first side support body 31, and a second side support body 32.
  • the same configuration of the first side support 31 and the second side support will be described as "side support 31, 32".
  • the upper frame 33 is a frame having a square shape in plan view, and is disposed to face the base 22 of the OIS fixing portion 20 in the optical axis direction.
  • the upper frame 33 is formed of a material having a relatively high rigidity.
  • a metal material or a resin material can be applied to the upper housing 33, but from the viewpoint of weight reduction, a resin material is preferable.
  • the upper frame 33 is preferably a liquid crystal polymer (LCP resin).
  • the side supports 31, 32 are formed of an elastomer material. Therefore, compared with the case where the suspension wire is used as the support portion for the OIS, the risk of breakage of the side supports 31 and 32 due to the impact such as dropping is extremely low. Therefore, high reliability can be ensured, and the OIS sensitivity of the lens driving device 1 can be improved. Further, since the primary resonance of the OIS driving portion can be suppressed by the damping force of the elastic body, the step of applying the cushioning material when the hanging wire is applied is no longer required, and the assembly work is simplified, so that the production efficiency is improved.
  • the elastomer material is preferably a thermoplastic elastomer (for example, a polyester elastomer) which can be designed to have a small spring constant and can be injection-molded. Heat resistance of polyester elastomers and It has excellent low-temperature characteristics and has relatively stable softness even when the temperature changes.
  • a thermoplastic elastomer for example, a polyester elastomer
  • the side supports 31 and 32 are columnar members having strength capable of supporting the OIS movable portion 10. Two first side support bodies 31 or two second side support bodies 32 are disposed on each of the four sides of the upper frame body 33. Further, the side support members 31 and 32 may be plate-like members that cover the side surfaces of the OIS movable portion.
  • the side support bodies 31, 32 have a biaxial hinge structure which can be moved in parallel in the orthogonal plane of the optical axis of the OIS movable portion 10 by bending the two shafts toward the center.
  • the first side support body 31 has two Y hinge portions 31a and 31b whose thickness is formed to be thinner than the circumference and is oriented in the Y direction.
  • the Y hinge portions 31a and 31b are constituted by hinge grooves formed on the outer surface of the first side support body 31.
  • the second side support 32 has the same shape as the first side support 31. That is, the second side support body 32 has two X hinge portions 32a, 32b which are formed to be thinner than the circumference and extend in the X direction.
  • the X hinge portions 32a and 32b are constituted by hinge grooves formed on the outer surface of the second side support body 321 .
  • the shape of the hinge groove in the first side support body 31 and the second side support body 32 is not particularly limited, but preferably has an R shape. Thereby, the durability of the bending operation repeated at the time of the shake correction is improved.
  • the first side support body 31 is suspended from the respective ends of the upper side frame 33 on both sides in the Y direction. One end portion of the first side support body 31 is fixed to the upper frame body 33, and the other end portion is fixed to the OIS movable portion 10 (here, the magnet holder 121).
  • the second side support body 32 is suspended from the respective ends of the upper side frame 33 on both sides in the X direction. One end of the second side support 32 is fixed to the upper frame 33, and the other end is fixed to the OIS fixing portion 20 (here, the coil substrate 21).
  • the upper housing 33 of the OIS link member 30 is in a state of being placed on the light receiving side of the OIS fixing portion 20 in the optical axis direction by the second side support 32. Further, the OIS movable portion 10 is in a state of being suspended by the first side support body 31 on the upper housing 33.
  • the OIS movable portion 10 moves in the Y direction, only the second side support 32 is elastically deformed, and the first side support 31 is not elastically deformed.
  • the OIS movable portion 10 moves in the X direction, only the first side support body 31 is elastically deformed, and the second side support body 32 is not elastically deformed. That is, the OIS movable portion 10 can independently move in the X direction and the Y direction.
  • the OIS support portion 30 includes the upper housing 33 and is disposed to face the OIS fixing portion 20 in the optical axis direction, and the first side support 31 is in the X direction (the first direction orthogonal to the optical axis direction).
  • the upper frame 33 and the OIS movable portion 10 are respectively coupled to each other, and the second side support 32 is opposed to the Y direction (the second direction orthogonal to the optical axis direction and the first direction)
  • the upper frame 33 and the OIS fixing portion 20 are connected to each other.
  • the first side support body 31 has two Y hinge portions 31a, 31b whose thickness is thinner than the circumference and is axially oriented in the Y direction, and with the movement of the OIS movable portion 10 in the X direction, with two Y hinge portions
  • the bending directions at 31a and 31b are curved in opposite directions from each other (see Fig. 10).
  • the second side support body 32 has two X hinge portions 32a, 32b whose thickness is thinner than the circumference and is axially oriented in the X direction, and with the movement of the OIS movable portion 10 in the Y direction, with two X hinge portions
  • the bending directions at 32a and 32b are curved in opposite directions to each other (see Fig. 11).
  • the OIS support portion 30 is a mechanical hinge structure that utilizes the elasticity of the elastic body, so that the OIS movable portion 10 can be moved with a small force, so that power saving can be achieved. In addition, the parallelism of the OIS movable portion 10 is ensured, so that the tilt characteristic is improved.
  • FIG. 6 is an exploded perspective view of the OIS movable portion 10.
  • FIG. 7 is a view showing a mounted state of the AF support portion 13 and the AF movable portion 11.
  • 7A is a plan view
  • FIG. 7B is a front view
  • FIG. 7C is a rear view
  • FIG. 7D is a left side view
  • FIG. 7E is a right side view.
  • the coordinate axes are only shown in FIG. 7A.
  • FIG. 8 is a perspective view showing a mounted state of the AF support portion 13 and the AF movable portion 11.
  • the OIS movable portion 10 includes an AF movable portion 11 , an AF fixing portion 12 , an AF support portion 13 , and the like.
  • the AF movable portion 11 is disposed to be spaced apart from the AF fixing portion 12 in the radial direction, and is coupled to the AF fixing portion 12 by the AF supporting portion 13 .
  • the AF movable portion 11 has an AF coil portion 112 that constitutes an AF voice coil motor, and is a portion that moves in the optical axis direction at the time of focusing.
  • the AF fixing unit 12 has an AF magnet portion 122A that constitutes an AF voice coil motor, and is a portion that supports the AF movable portion 11 via the AF support portion 13. That is, the AF drive unit of the lens driving device 1 employs a movable coil method.
  • the AF movable portion 11 has a lens holder 111, an AF coil portion 112, an AF position detecting portion 113, and a sensor substrate 114.
  • the lens holder 111 has a cylindrical lens accommodating portion 111a, and the lens portion 2 is fixed to the lens accommodating portion 111a by adhesion or screwing.
  • the lens holder 111 has a configuration on the side along the X direction
  • the coil attachment portion 111b of the AF coil portion 112. Further, the lens holder 111 has a link mounting portion 111c on both side faces along the Y direction.
  • the AF coil portion 112 is an air-core coil that is energized at the time of focusing, and is wound around the coil attachment portion 111b of the lens holder 111. Both ends of the coil of the AF coil portion 112 are connected to the sensor substrate 114.
  • the AF coil portion 112 has an elliptical shape and is disposed such that the coil surface is parallel to the optical axis, and the XZ plane is disposed as a coil surface.
  • the AF coil portion 112 faces the magnet portion 122 (first magnet 122A).
  • the sensor substrate 114 is a flexible printed board on which the AF position detecting unit 113 is mounted.
  • the sensor substrate 114 has a flat portion 114a disposed on the imaging side in the optical axis direction of the lens holder 111, and a sensor mounting portion 114b that is erected from the flat portion 114a and bent in a U shape, and is coupled to the coil mounting portion 111b of the lens holder 111. Adjacent configuration.
  • the sensor board 114 has a power supply line (not shown) for supplying power to the AF coil unit 112 and the AF position detecting unit 113, and a signal line (not shown) for detecting signals output from the AF position detecting unit 113. Wait.
  • Each wiring of the sensor substrate 114 is electrically connected to the wiring of the chassis 22.
  • the AF position detecting unit 113 is, for example, a Hall element that detects a magnetic field by a Hall effect (hereinafter referred to as "AF Hall element 113").
  • the AF Hall element 113 mainly detects the magnetic field formed by the first magnet 122A. According to the detection result of the AF Hall element 113, the position of the AF movable portion 11 in the optical axis direction can be determined.
  • the AF Hall element 113 is used when focusing by the closed loop droop control.
  • the AF Hall element 113 is mounted on the sensor mounting portion 114b of the sensor substrate 114.
  • the AF movable portion 11 includes the AF Hall element 113 (AF position detecting unit), and the AF Hall element 113 (AF position detecting unit) is disposed on a surface that intersects with the extending direction of the arm 412 (in the figure)
  • the XZ plane) detects the position of the AF movable portion 11 in the optical axis direction in accordance with the change in the magnetic field.
  • the position detecting magnet may be disposed in the AF fixing portion 12 independently of the first magnet 122A.
  • the AF movable portion 11 is supported by the AF support portion 13 that is attached to the AF fixing portion 12 in a cantilever state.
  • vibration (resonance) is likely to occur in a direction crossing the extending direction of the arm 412 of the AF support portion 13. Therefore, if the AF Hall element 113 is disposed on the surface (YZ plane in the drawing) along the extending direction of the arm 412, the positional deviation due to resonance is easily affected, and the Hall element for AF may be caused. The detection accuracy of 113 is degraded.
  • the AF Hall element 113 is disposed on the surface that intersects with the extending direction of the arm 412, the AF Hall element 113 is less likely to be affected by the positional deviation due to resonance, and can be detected with high detection. The position of the AF movable portion 11 is detected with accuracy.
  • the AF fixing portion 12 has a magnet holder 121 and a magnet portion 122.
  • the magnet portion 122 has a first magnet 122A and a second magnet 122B.
  • the first magnet 122A and the second magnet 122B are rectangular parallelepiped permanent magnets (reference numerals are omitted) having two sides and four poles. That is, in the first magnet 122A and the second magnet 122B, the N pole and the S pole are equally formed on all six faces.
  • the first magnet 122A is disposed in the X direction so as to face the AF coil portion 112.
  • the second magnet 122B is arranged in the Y direction.
  • the size and position of the AF coil portion 112 and the first magnet 122A are set such that the two long side magnetic fields passing through the AF coil portion 112 in the Y direction are opposite to each other. Thereby, when the AF coil portion 112 is energized, the Lorentz force in the same direction is generated in the Z direction on the two long side portions of the AF coil portion 122.
  • the first magnet 122A (the magnet portion for AF) has a rectangular parallelepiped shape having two faces and four poles, and is disposed along the X direction (the first direction orthogonal to the optical axis direction).
  • the AF coil portion 112 has an elliptical shape, and is disposed such that the coil surface faces the first magnet 122A, and the two long side portions are opposite to the magnetic flux from the first magnet 122A.
  • the first magnet 122A and the AF coil unit 112 constitute an AF voice coil motor. Further, the first magnet 122A and the second magnet 122B and the OIS coil portion 211 (see FIG. 9) constitute an OIS voice coil motor. In other words, the first magnet 122A also serves as the AF magnet portion and the OIS magnet portion.
  • the first magnet 122A and the second magnet 122B are used to detect the position of the OIS movable portion 10 in the plane orthogonal to the optical axis.
  • the first magnet 122A is used to detect the position of the AF movable portion 11 in the optical axis direction.
  • a magnet for position detection may be disposed in the AF fixing portion 12 (OIS movable portion 10) independently of the first magnet 122A and the second magnet 122B.
  • the magnet holder 121 has a space in which the AF movable portion 11 can be housed, and is a square tubular body that is substantially square in plan view.
  • the magnet holder 121 has a magnet housing portion 121a on one side wall along the X direction, and a magnet housing portion 121b on one side wall in the Y direction.
  • the first magnet 122A is disposed in the magnet housing portion 121a
  • the second magnet 122B is disposed in the magnet housing portion 121b.
  • the magnet holder 121 has an AF link fixing portion 121c on the other side wall along the X direction.
  • the magnet holder fixing portion 131 of the AF link member 13 is fixed to the AF link fixing portion 121c.
  • the magnet holder 121 has an OIS link fixing portion 121d at each end (four locations) on both sides in the Y direction.
  • the first side support body 31 of the OIS link member 30 is fixed to each OIS link fixing portion 121d.
  • the AF support portion 13 supports the AF movable portion 11 with respect to the AF fixing portion 12.
  • the AF support member 13 is a link member that uses elasticity of the elastic body in the same manner as the OIS link member 30 (hereinafter referred to as "AF link member 13". ").
  • the AF link member 13 is attached to the AF fixing portion 12 (the magnet holder 121) in a cantilever state.
  • the AF link member 13 has a support portion body 41 and a reinforcing portion 42.
  • the support body 41 has a magnet holder fixing portion 411, an arm 412, and a lens holder fixing portion 413.
  • the magnet holder fixing portion 411 has a shape corresponding to the AF link fixing portion 121c of the magnet holder 121.
  • the magnet holder fixing portion 411 has a sleeve housing portion 411a for inserting the restriction sleeve 111d of the lens holder 111.
  • the lens holder fixing portion 413 has a notch portion 413a corresponding to the link mounting portion 111c of the lens holder 111.
  • the arm 412 is formed from an elastomeric material.
  • the arm 412 has a curved shape along the circumferential surface of the lens holder accommodating portion 111a.
  • the two arms 412 respectively have an upper arm 412A and a lower arm 412B which are spaced apart in the optical axis direction.
  • the base end portions of the upper arm 412A and the lower arm 412B are connected to the magnet holder fixing portion 411 and indirectly fixed to the AF fixing portion 12.
  • the front end portions of the upper arm 412A and the lower arm 412B are coupled by the lens holder fixing portion 413.
  • the upper arm 412A and the lower arm 412B have a biaxial hinge structure that can move the AF movable portion 11 in parallel by bending the two shafts toward the center.
  • the AF movable portion 11 can be moved with a small force, so that power saving can be achieved.
  • the upper arm 412A and the lower arm 412B have two hinge portions 412a and 412b whose thickness is thinner than the circumference and whose axis is the X direction.
  • the hinge portions 412a and 412b are formed by hinge grooves formed at an acute angle on the inner surfaces of the upper arm 412A and the lower arm 412B.
  • the shape of the hinge groove is not particularly limited, but preferably has an R shape.
  • the reinforcing portion 42 is disposed between the two hinge portions 412a and 412b in the arm 412.
  • the reinforcing portion 42 is formed of a material having a higher rigidity than the elastomer material, that is, a material having a small coefficient of thermal expansion.
  • the reinforcing portion 42 is formed by insert molding a metal piece such as a stainless steel piece.
  • the reinforcing portion 42 is formed by two-color molding of a resin material (for example, a liquid crystal polymer).
  • the size of the reinforcing portion 42 may be such a degree that the resonance of the AF movable portion 11 can be suppressed.
  • the reinforcing portion 42 may be provided between the hinge portion 412a and the hinge portion 412b.
  • the thermal expansion rate of the elastomer material is relatively large, the higher the ambient temperature, the extension of the arm 412 The longer the direction is elongated. When the arm 412 becomes long, it becomes susceptible to resonance. Further, since the position of the AF movable portion 11 in the plane orthogonal to the optical axis deviates from the distance corresponding to the elongation length, accurate shake correction cannot be performed, and the picture quality is degraded. Although the shake correction can be performed in consideration of the elongation of the arm 412, the arithmetic processing is complicated and the processing load is increased, which is not preferable.
  • FIG. 13 is a view showing frequency characteristics of the AF position detecting unit 113. As shown in FIG. 13, when the reinforcing portion 42 is disposed, the resonance generated in the vicinity of 1 kHz shifts to the high frequency, and the resonance peak significantly decreases.
  • the stability at the time of performing the closed loop droop control based on the detection signals of the AF position detecting unit 113 and the OIS position detecting unit 23 is improved, and the reliability of the lens driving device 1 is improved.
  • the lens holder 111 is configured to be located inside the arm 412.
  • the notch portion 413a of the AF link member 13 is fitted and bonded to the link attachment portion 111c of the lens holder 111, thereby coupling the lens holder 111 and the AF link member 13. Since the AF link member 13 is disposed close to the side surface of the lens holder 111, it is possible to suppress the plan view size of the lens driving device 1 and to support the AF movable portion 11 in a stable state.
  • restriction sleeve 111d of the lens holder 111 is inserted into the sleeve accommodating portion 411a of the AF link member 13.
  • the restriction sleeve 111d functions as a restriction portion that restricts the movement of the AF movable portion 11 in the optical axis direction.
  • the upper end of the restriction sleeve 111d (the end on the light-receiving side in the optical axis direction) or the lower end (the end on the imaging-side side in the optical axis direction) abuts against the sleeve accommodating portion. 411a, thereby limiting greater movement.
  • the gap between the restriction sleeve 111d and the sleeve housing portion 411a is sealed by the damping material 115. Thereby, the resonance level of the AF movable portion 11 can be further reduced.
  • the support portion body 41 has a magnet holder fixing portion 411 (fixed end) connected to the AF fixing portion 12, a lens holder fixing portion 413 (free end) connected to the AF movable portion 11, and an arm coupled to the magnet holder.
  • the arm 412 is formed of an elastomer material and has two hinge portions 412a, 412b formed to be thinner than the circumference and having an X-axis (a direction orthogonal to the optical axis direction), and is accompanied by the AF movable portion 11 Movement in the direction of the optical axis, with a hinge
  • the bending directions at the portions 412a and 412b are curved in opposite directions from each other (see FIG. 11). Thereby, the durability against the bending operation repeated at the time of auto focusing is improved, and the risk of breakage due to an impact such as dropping is extremely low.
  • FIG. 9 is an exploded perspective view of the OIS fixing portion 20.
  • the OIS fixing unit 20 includes a coil substrate 21 , a base 22 , an OIS position detecting unit 23 , and the like.
  • the coil substrate 21 is a substrate having an L shape in plan view. By providing the coil substrate 21 in an L shape, the number of holes of the rectangular substrate is increased, so that cost reduction can be achieved.
  • the coil substrate 21 has an OIS coil portion 211 at a position facing the magnet portion 122 in the optical axis direction.
  • the OIS coil portion 211 has a first OIS coil 211A and a second OIS coil 211B corresponding to the first magnet 122A and the second magnet 122B.
  • the first OIS coil 211A is formed of two planar coils of an elliptical shape.
  • the first OIS coil 211A is disposed such that the coil surface faces the surface on the imaging side of the optical axis direction of the first magnet 122A.
  • the second OIS coil 122B is formed of two planar coils of an elliptical shape.
  • the second OIS coil 211B is disposed such that the coil surface faces the surface on the imaging side of the optical axis direction of the second magnet 122B.
  • the size and position of the OIS coil portion 211 and the magnet portion 122 are set such that the reverse magnetic field passes through the two long side portions of the respective OIS coils 211 in the Z direction.
  • the Lorentz force in the X direction or the Y direction is generated in the two long side portions of the OIS coil portion 211.
  • the base 22 is a member having a square shape in plan view, and has a circular opening 22a at the center.
  • the base 22 has a standing wall 22b at the periphery of the opening 22a. The positioning of the coil substrate is performed with respect to the base 22 by the upright wall 22b.
  • the OIS position detecting portion 23 is mounted on the base 22.
  • the OIS position detecting unit 23 is, for example, a Hall element that detects a magnetic field by a Hall effect (hereinafter referred to as "OIS Hall element 23").
  • OIS Hall element 23 On the two adjacent sides of the base 22, the OIS Hall element 23 is disposed correspondingly at a substantially central portion of each of the OIS coils 211.
  • the OIS Hall element 23 mainly detects the magnetic field formed by the magnet portion 122. According to the detection result of the OIS Hall element 23, the position of the OIS movable portion 10 in the plane orthogonal to the optical axis can be determined. Further, the position detecting magnet may be disposed in the OIS movable portion 10 independently of the magnet portion 122.
  • the base 22 has a power supply line (not shown) for supplying power to the AF coil unit 112, the OIS coil unit 211, the AF position detecting unit 113, and the OIS position detecting unit 23, and the AF position.
  • a signal line (not shown) for detecting a signal output from the detection unit 113 and the OIS position detecting unit 23 is placed.
  • These wirings are buried inside the base 22, for example, by insert molding. Thereby, the printed wiring board on which the position detecting unit 23 for OIS is mounted can be omitted, so that the size and weight of the camera module can be reduced.
  • the Lorentz force is generated in the OIS coil portion 211 by the interaction between the magnetic field of the magnet portion 122 and the current flowing to the OIS coil portion 211. Lemming's left-hand rule).
  • the direction of the Lorentz force is a direction (Y direction or X direction) orthogonal to the direction of the magnetic field (Z direction) and the direction (X direction or Y direction) of the current flowing to the long side portion of the OIS coil portion 211.
  • the OIS coil portion 211 Since the OIS coil portion 211 is fixed, a reaction force acts on the magnet portion 122. This reaction force is the driving force of the OIS voice coil motor, and the OIS movable portion 10 having the magnet portion 122 is swung in the XY plane to perform shake correction. Specifically, the energization current of the shake correction coil unit 211 is controlled based on a detection signal indicating the angle shake from the shake detection unit (for example, a gyro sensor, not shown) so that the angular shake of the camera module A cancels each other. . At this time, by feeding back the detection result of the OIS position detecting unit 23, the translational movement of the OIS movable portion 10 can be accurately controlled.
  • a detection signal indicating the angle shake from the shake detection unit for example, a gyro sensor, not shown
  • the first side support body 31 of the OIS link member 30 is bent as shown in FIG. 10B. . That is, as shown in FIG. 10B, the portion of the first side support 31 below the Y hinge portion 31a moves together with the OIS movable portion 10 (the magnet holder 121) in the X direction, but the portion above the Y hinge portion 31b. Since it is indirectly connected to the OIS fixing portion 20 via the upper housing 33 and the second side support 32, it does not move. Therefore, the first side support body 31 is curved in such a manner that the bending directions at the Y hinge portions 31a and 31b are opposite directions.
  • the second side portion of the OIS link member 30 is used.
  • the support body 32 is curved. That is, the portion of the second side support 32 above the X hinge portion 32a moves in the Y direction together with the OIS movable portion 10 (the magnet holder 121), but the portion located below the X hinge portion 32b is connected to the OIS fixing portion. 20 is on the base 22 and therefore does not move. Therefore, the second side support 32 is curved such that the bending directions at the X hinge portions 32a and 32b are opposite directions.
  • the lens driving device 1 when the AF coil portion 112 is energized, based on the first magnetic The interaction between the magnetic field of the iron 122A and the current flowing to the AF coil portion 112 generates a Lorentz force in the AF coil portion 112.
  • the direction of the Lorentz force is a direction (Z direction) orthogonal to the direction of the magnetic field (Y direction) and the direction of the current flowing to the AF coil portion 112 (X direction).
  • This force becomes the driving force of the AF voice coil motor, and the AF movable portion 11 having the AF coil portion 112 moves in the optical axis direction to perform focusing.
  • the focus position is adjusted by analyzing the plurality of pieces of image information acquired by the imaging unit (not shown) while moving the AF movable unit 11 and performing contrast evaluation.
  • the AF movable portion 11 is held by the AF link member 13 in a state of being suspended between the infinity position and the macro position (hereinafter referred to as "reference state").
  • the AF movable portion 11 (lens holder 111) passes through the AF link member 13 and is positioned in the Z direction with respect to the AF fixing portion 12 (the magnet holder 121). The way of displacement on both sides is supported.
  • the direction of the current is controlled in accordance with whether the AF movable portion 11 is moved from the reference state toward the macro position side or toward the infinity position side. Further, the magnitude of the current is controlled in accordance with the moving distance of the AF movable portion 11.
  • the arm 412 of the AF link member 13 is bent as shown in FIG. 12B. That is, as shown in Fig. 13B, the portion of the arm 412 located on the left side of the hinge portion 412b moves in the Z direction together with the AF movable portion 11, but the portion located on the right side of the hinge portion 412a is connected to the AF by the magnet holder fixing portion 131. It is fixed on the fixed portion 12 and therefore does not move. Therefore, the arm 412 is curved in such a manner that the bending directions at the hinge portions 412a, 412b are opposite directions.
  • the lens driving device 1 includes a shake correction drive unit including a magnet portion 122 (shake correction magnet portion) disposed around the lens portion 2 and an OIS coil portion 211 (shake correction coil portion).
  • the OIS support portion 30 (shake correction support portion) is disposed in the optical axis direction with respect to the OIS fixing portion 20 (jitter correction fixing portion) including the OIS coil portion 211.
  • the OIS movable portion 10 (jitter correction movable portion) including the magnet portion 122 is supported by the driving force of the OIS voice coil motor composed of the OIS coil portion 211 and the magnet portion 122.
  • the OIS movable portion 10 is swung with respect to the OIS fixing portion 20 in a plane orthogonal to the optical axis direction to perform shake correction.
  • the OIS movable portion 10 includes an autofocus driving unit including an AF coil unit 112 (autofocus coil unit) disposed around the lens unit 2, and a first magnet 122A (autofocus magnet)
  • the AF support coil portion 112 is spaced apart from each other in the radial direction; and the AF support portion 13 (autofocus support portion) is attached to the AF fixing portion 12 (autofocus fixing portion) including the first magnet 122A.
  • the AF movable portion 11 (automatic focus movable portion) including the AF coil portion 112 that supports the driving force of the AF voice coil motor including the AF coil portion 112 and the first magnet 122A is supported.
  • the AF movable portion 11 is moved relative to the AF fixing portion 12 in the optical axis direction to automatically perform focusing.
  • the OIS support portion 30 has a biaxial hinge structure formed of an elastomer material and movably supports the OIS movable portion 10 in a plane orthogonal to the optical axis.
  • the AF support portion 13 has a support portion body 41 and a reinforcing portion 42.
  • the support portion body 41 has a magnet holder fixing portion 411 (fixed end) connected to the AF fixing portion 12, a lens holder fixing portion 413 (free end) connected to the AF movable portion 11, and an arm 412 connecting the magnet holder fixing portion 411 and lens holder fixing portion 413.
  • the arm 412 is formed of an elastomer material and has two hinge portions 412a, 412b whose thickness is formed to be thinner than the circumference and whose axis is orthogonal to the optical axis direction. Along with the movement of the AF movable portion 11 in the optical axis direction, the arm 412 is curved such that the bending directions of the two hinge portions 412a and 412b are opposite to each other.
  • the reinforcing portion 42 is formed of a material having a higher rigidity than the elastomer material, and is disposed between the two hinge portions 412a, 412b of the arm 412.
  • the lens driving device 1 the risk of damage to the shake correction support portion and the autofocus support portion due to an impact such as dropping is extremely low.
  • the structure is simple and the number of components is small. Further, the influence of the resonance received by the AF movable portion 11 can be remarkably reduced. Therefore, high reliability can be ensured, OIS sensitivity can be improved, and assembly work can be simplified.
  • the lens driving device 1 since the lens driving device 1 has the magnet portions 122 disposed only on the adjacent two sides, the magnet portions 122 can be separated from each other by providing the two lens driving devices 1 in a state of being reversed by 180 degrees. Therefore, a two-lens camera with less magnetic field interference can be realized.
  • the OIS support portion 30 and the AF support portion 13 are not limited to the support structure shown in the embodiment as long as they are formed of an elastomer material and have a biaxial hinge structure.
  • the OIS position detecting unit 23 that detects the position of the OIS movable portion 10 in the orthogonal plane of the optical axis can be mounted on the sensor substrate that is electrically connected to the chassis 22.
  • the first OIS coil 211A and the second OIS coil 211B may have an elliptical upper coil layer 211a (first coil layer) and an upper side in the longitudinal direction.
  • the coil layer 211a is divided into a two-layer structure composed of two lower coil layers 211b (second coil layers).
  • the upper coil layer 211a and the lower coil layer 211b are formed, for example, by one coil, and the direction of the current flowing therethrough is the same.
  • the upper coil layer 211a and the lower coil layer 211b may be formed of different coils. In this case, wiring is performed in such a manner that the direction of the current flowing through is the same.
  • the OIS Hall element 23 is disposed at a position corresponding to the divided portion of the lower coil layer 211b.
  • the "position corresponding to the divided portion" of course includes between the divided portions, and includes a position deviating from the divided portion in the optical axis direction.
  • the magnetic field B1 of the upper coil layer 211a passes through the OIS Hall element 23 from the bottom to the top.
  • the magnetic field B2 of the lower coil layer 211b passes through the OIS Hall element 23 from the top to the bottom. Therefore, the magnetic fields formed around the OIS Hall element 23 by the upper coil layer 211a and the lower coil layer 211b cancel each other.
  • the OIS coil portion 211 when the OIS coil portion 211 is energized, even if a magnetic field is generated in the OIS coil portion 211, the magnetic flux incident on the OIS Hall element 23 is reduced, so that the OIS coil portion 211 can be suppressed.
  • the effect of the magnetic field on the OIS Hall element 23 That is, the electrical resonance is suppressed, and even in the case of performing feedback control at 150 to 200 Hz, the gain in the low frequency band is improved. Therefore, the detection sensitivity of the OIS Hall element 23 is improved, the setup time of the OIS drive unit is also shortened, and the accuracy of the shake correction is also improved.
  • the upper coil layer 211a is not divided, a larger Lorentz force is generated in the OIS coil portion 211 than in the case where the entire OIS coil portion 211 is provided in a divided configuration. Therefore, the sensitivity of the shake correction is also improved.
  • the metal material when applied to the reinforcing portion 42 embedded in the arm 412 of the AF support portion 13, it can be used as a power supply line or a signal line of the AF coil portion 112 and the AF Hall element 113.
  • the wiring between the reinforcing portion 42 and the chassis 22 and the reinforcing portion 42 are electrically connected to the AF coil portion 112 and the AF Hall element 113, for example, high flexibility can be utilized. Flexible wiring.
  • the present invention can be applied to a camera-mounted device as an information device or a transportation device.
  • the camera-mounted device as an information device means that the camera module and the image information obtained by the camera module are processed.
  • the information device of the control unit includes, for example, a mobile phone with a camera, a notebook computer, a tablet terminal, a portable game machine, a web camera, and an in-vehicle device with a camera (for example, a rear monitoring device and a driving recorder device).
  • the camera mounting device as a transportation device refers to a transportation device having a control unit that processes a camera module and an image obtained by the camera module, and includes, for example, an automobile.
  • FIG. 16 is a view showing a car V as a camera mounting device on which a camera module VC (Vehicle Camera) is mounted.
  • 16A is a front view of the automobile V
  • FIG. 16B is a rear perspective view of the automobile V.
  • the car V is mounted with the camera module A described in the embodiment as the in-vehicle camera module VC.
  • the vehicle-mounted camera module VC is attached to the windshield toward the front, for example, or is attached to the tailgate toward the rear.
  • This in-vehicle camera module VC is used as a rear monitoring, a driving recorder, collision avoidance control, automatic driving control, and the like.

Abstract

A lens driving apparatus (1), a camera module (A), and a camera holding apparatus (M) are provided. A shake correction support section (30) of the lens driving apparatus (1) is made of an elastic material, and has a biaxial hinge structure that movably supports, in a plane orthogonal to an optical axis, a shake correction movable section (10). An auto focus support section (13) has a support body (41) and a reinforcing section (42). The support body (41) has a fixed end (411) connected to an auto focus fixing section (12), free ends (413) connected to an auto focus movable section (11), and arms (412) connected to the fixed end (411) and the free ends (413). The arms (412) are made of an elastic material, with two hinge sections (412a, 412b) thinner than surrounding structures and axes orthogonal to the optical axis, that move together with the auto focus movable section (11) towards the optical axis. The arms (412) bend in opposite directions at the two hinge sections (412a, 412b). The reinforcing sections (42) are made of a material more rigid than the elastic material of the arms, and are disposed between the two hinge sections (412a, 412b) of the arms (412).

Description

透镜驱动装置、摄像机模块以及摄像机搭载装置Lens driving device, camera module, and camera mounting device 技术领域Technical field
本发明涉及抖动修正用的透镜驱动装置、具有抖动修正功能的摄像机模块以及摄像机搭载装置。The present invention relates to a lens driving device for shake correction, a camera module having a shake correction function, and a camera mounting device.
背景技术Background technique
一般而言，在智能手机等便携终端中搭载有小型的摄像机模块。在这种摄像机模块中应用具有自动进行拍摄被拍摄物时的对焦的自动聚焦功能(以下称作“AF功能”，AF：Auto Focus)、以及光学修正拍摄时产生的抖动(振动)以减轻图像模糊的抖动修正功能(以下称作“OIS功能”，OIS：Optical Image Stabilization)的透镜驱动装置(例如专利文献1)。Generally, a small camera module is mounted on a portable terminal such as a smartphone. In this camera module, an auto focus function (hereinafter referred to as "AF function", AF: Auto Focus) that automatically performs focusing when the subject is photographed, and a shake (vibration) generated during optical correction shooting are applied to lighten the image. A lens driving device of a blurring shake correction function (hereinafter referred to as "OIS function", OIS: Optical Image Stabilization) (for example, Patent Document 1).
具有自动聚焦功能以及抖动修正功能的透镜驱动装置具备用于使透镜部沿光轴方向移动的自动聚焦用驱动部(以下称作“AF用驱动部”)、以及用于使透镜部在与光轴方向正交的平面内摆动的抖动修正用驱动部(以下称作“OIS用驱动部”)。The lens driving device having the autofocus function and the shake correction function includes an autofocus driving unit (hereinafter referred to as an "AF driving unit") for moving the lens portion in the optical axis direction, and a lens portion for the light portion. A shake correction drive unit (hereinafter referred to as "OIS drive unit") that swings in a plane in which the axial direction is orthogonal.
AF用驱动部例如具有：自动聚焦用线圈部(以下称作“AF用线圈部”)，配置在透镜部周围；自动聚焦用磁铁部(以下称作“AF用磁铁部”)，相对于AF用线圈部在径方向上隔开配置；以及弹性支撑部(例如板簧)，相对于例如包含AF用磁铁部的自动聚焦固定部(以下称作“AF固定部”)，弹性支撑包含透镜部以及AF用线圈部的自动聚焦可动部(以下称作“AF可动部”)。利用由AF用线圈部和AF用磁铁部构成的音圈马达的驱动力，使AF可动部沿光轴方向相对于AF固定部移动，从而自动进行对焦。此外，也存在AF固定部包含AF用线圈部而AF可动部包含AF用磁铁部的情况。The AF drive unit includes, for example, an autofocus coil unit (hereinafter referred to as an "AF coil portion") disposed around the lens portion, and an autofocus magnet portion (hereinafter referred to as "AF magnet portion"), relative to the AF. The coil portion is disposed to be spaced apart from each other in the radial direction; and the elastic support portion (for example, a leaf spring) is elastically supported to include the lens portion with respect to, for example, an autofocus fixing portion (hereinafter referred to as an "AF fixing portion") including the AF magnet portion. And an autofocus movable portion (hereinafter referred to as "AF movable portion") of the AF coil portion. By the driving force of the voice coil motor including the AF coil portion and the AF magnet portion, the AF movable portion is moved in the optical axis direction with respect to the AF fixing portion, and the focus is automatically performed. In addition, there is a case where the AF fixing portion includes the AF coil portion and the AF movable portion includes the AF magnet portion.
OIS用驱动部例如具有：抖动修正用磁铁部(以下称作“OIS用磁铁部”)，配置于AF用驱动部；抖动修正用线圈部(以下称作“OIS用线圈部”)，相对于OIS用磁铁部隔开配置；以及支撑部，相对于包含OIS用线圈部的抖动修正固定部(以下称作“OIS固定部”)，支撑包含AF用驱动部以及OIS用磁铁 部的抖动修正可动部(以下称作“OIS可动部”)。利用由OIS用磁铁部和OIS用线圈部构成的音圈马达的驱动力，使OIS可动部在与光轴方向正交的平面内相对于OIS固定部摆动，从而进行抖动修正(所谓的筒位移方式)。OIS用磁铁部也能够兼用作AF用磁铁部，在这种情况下，能够实现透镜驱动装置的小型化、低高度化。另外，作为相对于OIS固定部支撑OIS可动部的支撑部，例如能可使用吊线。The OIS drive unit includes, for example, a shake correction magnet unit (hereinafter referred to as “OIS magnet unit”), and is disposed in the AF drive unit and the shake correction coil unit (hereinafter referred to as “OIS coil unit”). The OIS is arranged to be spaced apart by the magnet portion, and the support portion is provided with the AF drive unit and the OIS magnet for the shake correction fixing portion (hereinafter referred to as "OIS fixing portion") including the OIS coil portion. The shake correction movable portion of the portion (hereinafter referred to as "OIS movable portion"). The OIS movable portion is swung with respect to the OIS fixing portion in a plane orthogonal to the optical axis direction by the driving force of the voice coil motor composed of the OIS magnet portion and the OIS coil portion, thereby performing shake correction (so-called cylinder Displacement mode). The OIS magnet portion can also serve as the AF magnet portion. In this case, the lens driving device can be reduced in size and height. Further, as the support portion that supports the OIS movable portion with respect to the OIS fixing portion, for example, a suspension wire can be used.
现有技术文献Prior art literature
专利文献Patent literature
专利文献1：日本特开2013-24938号公报Patent Document 1: Japanese Patent Laid-Open Publication No. 2013-24938
发明内容Summary of the invention
发明索要解决的技术问题Technical problems to be solved by invention
为了提高OIS用驱动部的灵敏度(以下称作“OIS灵敏度”)，吊线的线径越细越好。但是，若吊线的线径变细，则受到下落等的冲击时发生断裂的危险性上升。另外，吊线变得容易弯曲而OIS可动部变得无法平行移动(透镜部倾斜)，因此抖动修正时的倾斜特性下降。倾斜特性是表示抖动修正时的OIS可动部的平行度的指标，用伴随OIS可动部的移动的透镜部的倾斜角来表示。这样，若想要使吊线的线径变细来提高OIS灵敏度，则透镜驱动装置的可靠性将受损。In order to increase the sensitivity of the OIS driving unit (hereinafter referred to as "OIS sensitivity"), the wire diameter of the hanging wire is as fine as possible. However, if the wire diameter of the suspension wire is reduced, the risk of breakage due to an impact such as a drop increases. Further, since the suspension wire is easily bent and the OIS movable portion cannot move in parallel (the lens portion is inclined), the inclination characteristic at the time of shake correction is lowered. The tilt characteristic is an index indicating the parallelism of the OIS movable portion at the time of shake correction, and is expressed by the tilt angle of the lens portion accompanying the movement of the OIS movable portion. Thus, if the wire diameter of the suspension wire is to be thinned to increase the OIS sensitivity, the reliability of the lens driving device is impaired.
另外，在以往的AF用驱动部中，采用了通过板簧夹持AF可动部的结构，因此部件数量多，结构复杂，需要繁琐的装配作业。Further, in the conventional AF drive unit, since the AF movable portion is sandwiched by the leaf spring, the number of components is large, the structure is complicated, and complicated assembly work is required.
本发明的目的在于提供一种既能确保高可靠性又能提高OIS灵敏度、而且还能使装配作业简化的透镜驱动装置、具备该透镜驱动装置的摄像机模块以及摄像机搭载装置。An object of the present invention is to provide a lens driving device that can ensure high reliability while improving OIS sensitivity, and that can simplify assembly work, a camera module including the lens driving device, and a camera mounting device.
用于解决技术问题的方案Solution for solving technical problems
反映本发明的一个技术方案的透镜驱动装置具备抖动修正用驱动部，该抖动修正用驱动部具有：抖动修正用磁铁部，配置在透镜部周围；抖动修正用线圈部，从所述抖动修正用磁铁部隔开配置；以及抖动修正用支撑部，相对于包含所述抖动修正用线圈部的抖动修正固定部，以在光轴方向上隔开的状态支撑包含所述抖动修正用磁铁部的抖动修正可动部，该抖动修正用驱动 部利用由所述抖动修正用线圈部和所述抖动修正用磁铁部构成的抖动修正用音圈马达的驱动力，使所述抖动修正可动部在与光轴方向正交的平面内相对于所述抖动修正固定部摆动，从而进行抖动修正；A lens driving device according to an aspect of the present invention includes a shake correction drive unit including a shake correction magnet unit disposed around the lens unit, and a shake correction coil unit for correcting the shake And the shake correction support portion supports the shake including the shake correction magnet portion in a state of being spaced apart in the optical axis direction with respect to the shake correction fixing portion including the shake correction coil portion. Correcting the movable portion, the shake correction drive The driving force of the shake correction voice coil motor including the shake correction coil portion and the shake correction magnet portion is such that the shake correction movable portion is opposed to the plane orthogonal to the optical axis direction. The shake correction fixing portion is swung to perform shake correction;
所述抖动修正可动部包含自动聚焦用驱动部，该自动聚焦用驱动部具有：自动聚焦用线圈部，配置在所述透镜部周围；自动聚焦用磁铁部，相对于所述自动聚焦用线圈部在径方向上隔开配置；以及自动聚焦用支撑部，相对于包含所述自动聚焦用磁铁部的自动聚焦固定部，支撑包含所述自动聚焦用线圈部的自动聚焦可动部，该自动聚焦用驱动部利用由所述自动聚焦用线圈部和所述自动聚焦用磁铁部构成的自动聚焦用音圈马达的驱动力，使所述自动聚焦可动部沿光轴方向相对于所述自动聚焦固定部移动，从而自动进行对焦；The shake correction movable unit includes an autofocus drive unit including an autofocus coil unit disposed around the lens unit, and an autofocus magnet unit for the autofocus coil. And the autofocus holding portion supports the autofocus movable portion including the autofocus coil portion with respect to the autofocus fixing portion including the autofocus magnet portion, the autofocus holding portion The focus drive unit uses the driving force of the autofocus voice coil motor including the autofocus coil unit and the autofocus magnet unit to cause the autofocus movable portion to be relative to the automatic in the optical axis direction. Focusing the fixed part to move, thereby automatically focusing;
所述抖动修正用支撑部具有双轴铰链结构，该双轴铰链结构由弹性体材料形成，且在与光轴正交的面内可移动地支撑所述抖动修正可动部；The shake correction support portion has a biaxial hinge structure formed of an elastomer material and movably supporting the shake correction movable portion in a plane orthogonal to the optical axis;
所述自动聚焦用支撑部具有支撑部本体和补强部；The autofocus support portion has a support portion body and a reinforcing portion;
所述支撑部本体具有：固定端，连接于所述自动聚焦固定部；自由端，连接于所述自动聚焦可动部；以及臂，连结所述固定端与所述自由端；The support body has a fixed end connected to the autofocus fixing portion, a free end connected to the autofocus movable portion, and an arm connecting the fixed end and the free end;
所述臂由弹性体材料形成，并具有厚度形成为比周围薄且以与光轴方向正交的方向为轴的两个铰链部，并且伴随着所述自动聚焦可动部朝向光轴方向的移动，所述臂以所述两个铰链部处的弯曲方向彼此为相反方向的方式弯曲；The arm is formed of an elastomer material and has two hinge portions having a thickness formed to be thinner than the circumference and oriented in a direction orthogonal to the optical axis direction, and accompanied by the autofocus movable portion toward the optical axis direction Moving, the arm is curved in such a manner that the bending directions at the two hinge portions are opposite to each other;
所述补强部由刚性比所述弹性体材料高的材料形成，且配置在所述臂的所述两个铰链部之间。The reinforcing portion is formed of a material having a higher rigidity than the elastomer material, and is disposed between the two hinge portions of the arm.
反映本发明的一个技术方案的摄像机模块具备：上述的透镜驱动装置；透镜部，安装于所述透镜驱动装置；摄像部，对通过所述透镜部成像的被拍摄物像进行摄像。A camera module according to an aspect of the present invention includes: the lens driving device described above; a lens unit attached to the lens driving device; and an imaging unit that images an image of the subject imaged by the lens portion.
反映本发明的一个技术方案的摄像机搭载装置是作为信息设备或者运输设备的摄像机搭载装置，其具备上述的摄像机模块。A camera mounting device that reflects one aspect of the present invention is a camera mounting device that is an information device or a transportation device, and includes the above-described camera module.
发明的效果Effect of the invention
根据本发明，因下落等的冲击导致抖动修正用支撑部和自动聚焦用支撑部发生破损的危险性变得极低。另外，与以往相比，结构简单且部件数量也少。进一步，能够显著地减少自动聚焦可动部受到的共振的影响。因此，能 够确保高可靠性，并且能够提高OIS灵敏度，而且还能够使装配作业简化。According to the present invention, the risk of damage to the shake correction support portion and the autofocus support portion due to the impact such as dropping is extremely low. In addition, compared with the prior art, the structure is simple and the number of parts is small. Further, the influence of the resonance received by the autofocus movable portion can be remarkably reduced. Therefore, can It ensures high reliability and improves OIS sensitivity, and it also simplifies assembly work.
附图说明DRAWINGS
图1是表示搭载本发明的一个实施方式的摄像机模块的智能手机的图。FIG. 1 is a view showing a smartphone on which a camera module according to an embodiment of the present invention is mounted.
图2是摄像机模块的外观立体图。2 is an external perspective view of a camera module.
图3是摄像机模块的分解立体图。3 is an exploded perspective view of the camera module.
图4是表示透镜驱动装置的图。4 is a view showing a lens driving device.
图5是透镜驱动装置的分解立体图。Fig. 5 is an exploded perspective view of the lens driving device.
图6是OIS可动部(AF用驱动部)的分解立体图。Fig. 6 is an exploded perspective view of the OIS movable portion (AF drive unit).
图7是表示AF用支撑部与AF可动部的安装状态的图。FIG. 7 is a view showing a mounted state of the AF support portion and the AF movable portion.
图8是表示AF用支撑部与AF可动部的安装状态的立体图。8 is a perspective view showing a mounted state of the AF support portion and the AF movable portion.
图9是OIS固定部的分解立体图。Fig. 9 is an exploded perspective view of the OIS fixing portion.
图10是表示OIS用支撑部(第一侧部支撑体)的弯曲形态的图。FIG. 10 is a view showing a curved form of the OIS support portion (first side support).
图11是表示OIS用支撑部(第二侧部支撑体)的弯曲形态的图。FIG. 11 is a view showing a curved form of the OIS support portion (second side support).
图12是表示AF用支撑部(臂)的弯曲形态的图。Fig. 12 is a view showing a curved form of an AF support portion (arm).
图13是表示AF用位置检测部的频率特性的图。FIG. 13 is a view showing frequency characteristics of the AF position detecting unit.
图14是表示OIS用线圈部的图。Fig. 14 is a view showing a coil portion for OIS.
图15是表示OIS用线圈部所产生的磁通与XY位置检测部的关系的图。FIG. 15 is a view showing a relationship between a magnetic flux generated by the OIS coil portion and an XY position detecting unit.
图16是表示作为搭载车载用摄像机模块的摄像机搭载装置的汽车的图。FIG. 16 is a view showing a car as a camera mounting device on which an in-vehicle camera module is mounted.
附图标记说明Description of the reference numerals
1：透镜驱动装置1: lens driving device
2：透镜部2: lens section
3：罩3: cover
10：OIS可动部(抖动修正可动部)10: OIS movable part (jitter correction movable part)
11：AF可动部(自动聚焦可动部)11: AF movable part (auto focus moving part)
111：透镜支架111: lens holder
112：AF用线圈部(自动聚焦用线圈部)112: AF coil portion (autofocus coil portion)
113：AF用位置检测部、AF用霍尔元件113: Position detecting unit for AF, Hall element for AF
114：传感器基板 114: sensor substrate
12：AF固定部(自动聚焦固定部)12: AF fixing part (auto focus fixing part)
121：磁铁支架121: magnet bracket
122：磁铁部122: Magnet section
122A：第一磁铁(自动聚焦用磁铁部、抖动修正用磁铁部)122A: First magnet (magnet part for autofocus, magnet part for shake correction)
122B：第二磁铁(抖动修正用磁铁部)122B: second magnet (magnet part for shake correction)
13：AF用支撑部、AF用链接部件(抖动修正用支撑部)13: AF support unit, AF link member (shake correction support unit)
20：OIS固定部(抖动修正固定部)20: OIS fixing part (jitter correction fixing part)
21：线圈基板21: coil substrate
211：OIS用线圈部(抖动修正用线圈部)211: OIS coil unit (shake correction coil unit)
211A：第一OIS线圈211A: First OIS coil
211B：第二OIS线圈211B: second OIS coil
22：底座22: base
23：OIS用位置检测部、OIS用霍尔元件23: Position detection unit for OIS, Hall element for OIS
30：OIS用支撑部、OIS用链接部件(抖动修正用支撑部)30: OIS support unit, OIS link member (shake correction support unit)
31：第一侧部支撑体31: first side support
31a、31b：Y铰链部31a, 31b: Y hinge
32：第二侧部支撑体32: second side support
32a、32b：X铰链部32a, 32b: X hinge part
33：上部框体33: upper frame
41：支撑部本体41: support body
411：磁铁支架固定部(固定端)411: magnet holder fixing portion (fixed end)
412：臂412: Arm
412a、412b：铰链部412a, 412b: hinge part
413：透镜支架固定部(自由端)413: lens holder fixing portion (free end)
42：补强部42: Reinforcement Department
A：摄像机模块A: Camera module
M：智能电话(摄像机搭载装置)M: smart phone (camera carrying device)
具体实施方式detailed description
下面，参照附图，对本发明的实施方式进行详细说明。 Embodiments of the present invention will be described in detail below with reference to the drawings.
图1是表示搭载本发明的一个实施方式的摄像机模块A的智能手机M(摄像机搭载装置)的图。图1A是智能手机M的前视图，图1B是智能手机M的后视图。FIG. 1 is a view showing a smartphone M (camera mounting device) on which a camera module A according to an embodiment of the present invention is mounted. FIG. 1A is a front view of the smartphone M, and FIG. 1B is a rear view of the smartphone M.
智能手机M例如搭载摄像机模块A，以作为背面摄像机OC。摄像机模块A具备自动聚焦功能以及抖动修正功能，自动进行拍摄被拍摄物时的对焦，并且修正拍摄时产生的抖动(振动)，以拍摄不存在图像模糊的图像。The smartphone M is equipped with, for example, a camera module A as a rear camera OC. The camera module A has an auto focus function and a shake correction function to automatically perform focusing when shooting a subject, and corrects shake (vibration) generated during shooting to capture an image without image blur.
图2是摄像机模块A的外观立体图。图3是摄像机模块A的分解立体图。如图2、图3所示，在本实施方式中，使用正交坐标系(X，Y，Z)来进行说明。在后述的图中，也用相同的正交坐标系(X，Y，Z)来表示。以如下方式搭载摄像机模块A，即在用智能手机M实际进行拍摄时，X方向为上下方向(或者左右方向)、Y方向为左右方向(或者上下方向)、Z方向为前后方向。即，Z方向为光轴方向，图中上侧为光轴方向受光侧(也称作“微距位置侧”)，下侧为光轴方向成像侧(也称作“无限远位置侧”)。另外，将与光轴方向正交的X方向以及Y方向称作“光轴正交方向”。FIG. 2 is an external perspective view of the camera module A. FIG. 3 is an exploded perspective view of the camera module A. As shown in FIGS. 2 and 3, in the present embodiment, an orthogonal coordinate system (X, Y, Z) will be used for explanation. In the drawings to be described later, the same orthogonal coordinate system (X, Y, Z) is also used. The camera module A is mounted in such a manner that when the smartphone M is actually photographed, the X direction is the up and down direction (or the left and right direction), the Y direction is the left and right direction (or the up and down direction), and the Z direction is the front and rear direction. That is, the Z direction is the optical axis direction, and the upper side in the figure is the optical axis direction light receiving side (also referred to as "macro position side"), and the lower side is the optical axis direction imaging side (also referred to as "infinity position side"). . Further, the X direction and the Y direction orthogonal to the optical axis direction are referred to as "optical axis orthogonal directions".
摄像机模块A具备将透镜收容在圆筒形状的透镜筒中的透镜部2、AF用及OIS用的透镜驱动装置1、对通过透镜部2成像的被拍摄物像进行摄像的摄像部(省略图示)、以及覆盖整体的罩3等。The camera module A includes a lens unit 2 for housing a lens in a cylindrical lens barrel, a lens driving device for AF and OIS, and an imaging unit that images an image of the subject imaged by the lens unit 2 (not shown). ), as well as covering the entire cover 3 and the like.
罩3是在从光轴方向观察的俯视时呈正方形状的有盖四方筒体，上表面具有圆形的开口3a。透镜部2从该开口3a面向外部。罩3被固定在透镜驱动装置1的OIS固定部20(参照图5)的底座23上。此外，罩3也可以由具有导电性的材料形成，并经由OIS固定部20接地。The cover 3 is a covered rectangular tubular body having a square shape in a plan view as seen from the optical axis direction, and has a circular opening 3a on its upper surface. The lens portion 2 faces the outside from the opening 3a. The cover 3 is fixed to the base 23 of the OIS fixing portion 20 (refer to FIG. 5) of the lens driving device 1. Further, the cover 3 may be formed of a material having conductivity and grounded via the OIS fixing portion 20.
摄像部(省略图示)具有摄像元件(省略图示)，且被配置在透镜驱动装置1的光轴方向成像侧、即OIS固定部20的光轴方向成像侧。摄像元件(省略图示)例如由CCD(charge coupled device，电荷耦合器件)型图像传感器、CMOS(complementary metal oxide semiconductor，互补金属氧化物半导体)型图像传感器等构成。摄像元件(省略图示)对通过透镜部2成像的被拍摄物像进行摄像，并输出与被拍摄物像相对应的电信号。The imaging unit (not shown) has an imaging element (not shown) and is disposed on the imaging side of the optical axis direction of the lens driving device 1 , that is, the imaging side of the OIS fixing unit 20 in the optical axis direction. The imaging element (not shown) is configured by, for example, a CCD (charge coupled device) type image sensor, a CMOS (complementary metal oxide semiconductor) type image sensor, or the like. The imaging element (not shown) images the subject image formed by the lens unit 2, and outputs an electrical signal corresponding to the subject image.
图4是表示透镜驱动装置1的图。图4A为俯视图，图4B为前视图，图4C为后视图，图4D为左视图，图4E为右视图。在图4A至图4E中，仅在图4A中示出了坐标轴。图5是透镜驱动装置1的分解立体图。如图4、图5 所示，透镜驱动装置1具备OIS可动部10、OIS固定部20以及OIS用支撑部30等。FIG. 4 is a view showing the lens driving device 1. 4A is a top view, FIG. 4B is a front view, FIG. 4C is a rear view, FIG. 4D is a left side view, and FIG. 4E is a right side view. In FIGS. 4A to 4E, the coordinate axes are only shown in FIG. 4A. FIG. 5 is an exploded perspective view of the lens driving device 1. Figure 4, Figure 5 As shown in the figure, the lens driving device 1 includes an OIS movable portion 10, an OIS fixing portion 20, an OIS support portion 30, and the like.
OIS可动部10具有构成OIS用音圈马达的OIS用磁铁部，是抖动修正时在与光轴正交的光轴正交面内摆动的部分。OIS固定部20具有构成OIS用音圈马达的OIS用线圈部，是借助OIS用支撑部30支撑OIS可动部10的部分。即，透镜驱动装置1中的OIS用驱动部采用了可动磁铁方式。OIS可动部10包含AF用驱动部。OIS可动部10以能够在与光轴方向正交的面内移动的方式，相对于OIS固定部20间隔开配置。在此，OIS可动部10相对于OIS固定部20朝光轴方向受光侧间隔开配置。The OIS movable portion 10 has an OIS magnet portion that constitutes an OIS voice coil motor, and is a portion that swings in an orthogonal plane of an optical axis orthogonal to the optical axis during shake correction. The OIS fixing portion 20 has an OIS coil portion constituting the OIS voice coil motor, and is a portion that supports the OIS movable portion 10 via the OIS support portion 30. In other words, the OIS driving unit in the lens driving device 1 employs a movable magnet method. The OIS movable unit 10 includes an AF drive unit. The OIS movable portion 10 is disposed to be spaced apart from the OIS fixing portion 20 so as to be movable in a plane orthogonal to the optical axis direction. Here, the OIS movable portion 10 is disposed to be spaced apart from the OIS fixing portion 20 toward the light receiving side in the optical axis direction.
OIS用支撑部30连结OIS固定部20与OIS可动部10。在本实施方式中，作为OIS用支撑部30，并非采用以往的吊线，而是采用利用了弹性体的链接部件(以下称作“OIS用链接部件30”)。弹性体是指橡胶状的弹性体，包含热固性弹性体(橡胶)以及热塑性弹性体(具有弹性的塑料)。The OIS fixing portion 20 and the OIS movable portion 10 are coupled to the OIS support portion 30. In the present embodiment, the OIS support portion 30 is a link member (hereinafter referred to as "the OIS link member 30") that uses an elastic body instead of the conventional suspension wire. The elastomer refers to a rubber-like elastomer comprising a thermosetting elastomer (rubber) and a thermoplastic elastomer (plastic having elasticity).
如图4、图5所示，OIS用链接部件30具有上部框体33、第一侧部支撑体31以及第二侧部支撑体32。此外，对于第一侧部支撑体31与第二侧部支撑体相同的结构，作为“侧部支撑体31、32”来进行说明。As shown in FIGS. 4 and 5, the OIS link member 30 has an upper frame body 33, a first side support body 31, and a second side support body 32. The same configuration of the first side support 31 and the second side support will be described as " side support 31, 32".
上部框体33是在俯视时呈正方形状的框体，在光轴方向上与OIS固定部20的底座22相对置地配置。上部框体33由刚性较高的材料形成。在上部框体33中，能够应用金属材料或者树脂材料，但从轻量化的观点考虑，优选为树脂材料。尤其是对于上部框体33，优选为液晶聚合物(LCP树脂)。通过由液晶聚合物形成上部框体33，既能够实现轻量化，又能够防止因OIS可动部10的自重造成的沉陷，从而能够确保良好的倾斜特性。The upper frame 33 is a frame having a square shape in plan view, and is disposed to face the base 22 of the OIS fixing portion 20 in the optical axis direction. The upper frame 33 is formed of a material having a relatively high rigidity. A metal material or a resin material can be applied to the upper housing 33, but from the viewpoint of weight reduction, a resin material is preferable. In particular, the upper frame 33 is preferably a liquid crystal polymer (LCP resin). By forming the upper frame 33 from the liquid crystal polymer, it is possible to achieve weight reduction and prevent sinking due to the self-weight of the OIS movable portion 10, thereby ensuring good tilt characteristics.
侧部支撑体31、32由弹性体材料形成。由此，与应用吊线作为OIS用支撑部的情况相比，因下落等的冲击导致侧部支撑体31、32发生破损的危险性变得极低。因此，能够确保高可靠性，并且能够提高透镜驱动装置1的OIS灵敏度。另外，由于能够利用弹性体的衰减力来抑制OIS用驱动部的一次谐振，因此不再需要在应用吊线时进行的涂敷缓冲材料的工序，使装配作业简化，因此使生产效率得到提高。The side supports 31, 32 are formed of an elastomer material. Therefore, compared with the case where the suspension wire is used as the support portion for the OIS, the risk of breakage of the side supports 31 and 32 due to the impact such as dropping is extremely low. Therefore, high reliability can be ensured, and the OIS sensitivity of the lens driving device 1 can be improved. Further, since the primary resonance of the OIS driving portion can be suppressed by the damping force of the elastic body, the step of applying the cushioning material when the hanging wire is applied is no longer required, and the assembly work is simplified, so that the production efficiency is improved.
作为弹性体材料，优选为能够将弹簧常数设计得较小且能够射出成型的量产性高的热塑性弹性体(例如聚酯类弹性体)。聚酯类弹性体的耐热性以及 低温特性优异，即使温度发生变化，也具有比较稳定的柔软性。The elastomer material is preferably a thermoplastic elastomer (for example, a polyester elastomer) which can be designed to have a small spring constant and can be injection-molded. Heat resistance of polyester elastomers and It has excellent low-temperature characteristics and has relatively stable softness even when the temperature changes.
侧部支撑体31、32是具有能够支撑OIS可动部10的强度的柱状部件。在上部框体33的四边，分别各配置有两个第一侧部支撑体31或者第二侧部支撑体32。此外，侧部支撑体31、32也可以是覆盖OIS可动部的侧面的板状部件。侧部支撑体31、32具有双轴铰链结构，该双轴铰链结构通过使两个轴朝中心弯曲，能够在OIS可动部10的光轴正交面内进行平行移动。The side supports 31 and 32 are columnar members having strength capable of supporting the OIS movable portion 10. Two first side support bodies 31 or two second side support bodies 32 are disposed on each of the four sides of the upper frame body 33. Further, the side support members 31 and 32 may be plate-like members that cover the side surfaces of the OIS movable portion. The side support bodies 31, 32 have a biaxial hinge structure which can be moved in parallel in the orthogonal plane of the optical axis of the OIS movable portion 10 by bending the two shafts toward the center.
具体而言，第一侧部支撑体31具有厚度形成为比周围薄且以Y方向为轴的两个Y铰链部31a、31b。在此，Y铰链部31a、31b由形成在第一侧部支撑体31外表面的铰链槽构成。Specifically, the first side support body 31 has two Y hinge portions 31a and 31b whose thickness is formed to be thinner than the circumference and is oriented in the Y direction. Here, the Y hinge portions 31a and 31b are constituted by hinge grooves formed on the outer surface of the first side support body 31.
第二侧部支撑体32具有与第一侧部支撑体31同样的形状。即，第二侧部支撑体32具有厚度形成为比周围薄且沿X方向延伸的两个X铰链部32a、32b。在此，X铰链部32a、32b由形成在第二侧部支撑体321外表面的铰链槽构成。The second side support 32 has the same shape as the first side support 31. That is, the second side support body 32 has two X hinge portions 32a, 32b which are formed to be thinner than the circumference and extend in the X direction. Here, the X hinge portions 32a and 32b are constituted by hinge grooves formed on the outer surface of the second side support body 321 .
第一侧部支撑体31以及第二侧部支撑体32中的铰链槽的形状并无特别限制，但优选具有R形状。由此，使相对于抖动修正时反复进行的弯曲动作的耐久性得到提高。The shape of the hinge groove in the first side support body 31 and the second side support body 32 is not particularly limited, but preferably has an R shape. Thereby, the durability of the bending operation repeated at the time of the shake correction is improved.
第一侧部支撑体31吊设在上部框体33的沿着Y方向的两边的各自的端部。第一侧部支撑体31的一个端部被固定于上部框体33，另一个端部被固定于OIS可动部10(在此为磁铁支架121)。The first side support body 31 is suspended from the respective ends of the upper side frame 33 on both sides in the Y direction. One end portion of the first side support body 31 is fixed to the upper frame body 33, and the other end portion is fixed to the OIS movable portion 10 (here, the magnet holder 121).
第二侧部支撑体32被吊设在上部框体33的沿着X方向的两边的各自的端部。第二侧部支撑体32的一个端部被固定于上部框体33，另一个端部被固定于OIS固定部20(在此为线圈基板21)。The second side support body 32 is suspended from the respective ends of the upper side frame 33 on both sides in the X direction. One end of the second side support 32 is fixed to the upper frame 33, and the other end is fixed to the OIS fixing portion 20 (here, the coil substrate 21).
OIS用链接部件30的上部框体33处于通过第二侧部支撑体32架设在OIS固定部20的光轴方向受光侧的状态。另外，OIS可动部10处于通过第一侧部支撑体31吊设在上部框体33上的状态。The upper housing 33 of the OIS link member 30 is in a state of being placed on the light receiving side of the OIS fixing portion 20 in the optical axis direction by the second side support 32. Further, the OIS movable portion 10 is in a state of being suspended by the first side support body 31 on the upper housing 33.
因此，在OIS可动部10沿Y方向移动时，只有第二侧部支撑体32发生弹性变形，而第一侧部支撑体31不发生弹性变形。另一方面，在OIS可动部10沿X方向移动时，只有第一侧部支撑体31发生弹性变形，而第二侧部支撑体32不发生弹性变形。即，OIS可动部10能够沿X方向以及Y方向独立地移动。 Therefore, when the OIS movable portion 10 moves in the Y direction, only the second side support 32 is elastically deformed, and the first side support 31 is not elastically deformed. On the other hand, when the OIS movable portion 10 moves in the X direction, only the first side support body 31 is elastically deformed, and the second side support body 32 is not elastically deformed. That is, the OIS movable portion 10 can independently move in the X direction and the Y direction.
这样，OIS用支撑部30具有：上部框体33，在光轴方向上与OIS固定部20相对置地配置；第一侧部支撑体31，在X方向(与光轴方向正交的第一方向)上相对置地配置，分别连结上部框体33与OIS可动部10；以及第二侧部支撑体32，在Y方向(与光轴方向以及第一方向正交的第二方向)上相对置地配置，分别连结上部框体33与OIS固定部20。第一侧部支撑体31具有厚度形成为比周围薄且以Y方向为轴的两个Y铰链部31a、31b，并且伴随着OIS可动部10朝向X方向的移动，以两个Y铰链部31a、31b处的弯曲方向彼此为相反方向的方式弯曲(参照图10)。第二侧部支撑体32具有厚度形成为比周围薄且以X方向为轴的两个X铰链部32a、32b，并且伴随着OIS可动部10朝向Y方向的移动，以两个X铰链部32a、32b处的弯曲方向彼此为相反方向的方式弯曲(参照图11)。As described above, the OIS support portion 30 includes the upper housing 33 and is disposed to face the OIS fixing portion 20 in the optical axis direction, and the first side support 31 is in the X direction (the first direction orthogonal to the optical axis direction). The upper frame 33 and the OIS movable portion 10 are respectively coupled to each other, and the second side support 32 is opposed to the Y direction (the second direction orthogonal to the optical axis direction and the first direction) The upper frame 33 and the OIS fixing portion 20 are connected to each other. The first side support body 31 has two Y hinge portions 31a, 31b whose thickness is thinner than the circumference and is axially oriented in the Y direction, and with the movement of the OIS movable portion 10 in the X direction, with two Y hinge portions The bending directions at 31a and 31b are curved in opposite directions from each other (see Fig. 10). The second side support body 32 has two X hinge portions 32a, 32b whose thickness is thinner than the circumference and is axially oriented in the X direction, and with the movement of the OIS movable portion 10 in the Y direction, with two X hinge portions The bending directions at 32a and 32b are curved in opposite directions to each other (see Fig. 11).
作为OIS用支撑部30，采用利用了弹性体的弹性的机械铰链结构，从而能够用较小的力使OIS可动部10移动，因此能够实现省电化。另外，OIS可动部10的平行度得以确保，因此使倾斜特性得到提高。The OIS support portion 30 is a mechanical hinge structure that utilizes the elasticity of the elastic body, so that the OIS movable portion 10 can be moved with a small force, so that power saving can be achieved. In addition, the parallelism of the OIS movable portion 10 is ensured, so that the tilt characteristic is improved.
图6是OIS可动部10的分解立体图。图7是表示AF用支撑部13与AF可动部11的安装状态的图。图7A为俯视图，图7B为前视图，图7C为后视图，图7D为左视图，图7E为右视图。在图7A至图7E中，仅在图7A中示出了坐标轴。图8是表示AF用支撑部13与AF可动部11的安装状态的立体图。FIG. 6 is an exploded perspective view of the OIS movable portion 10. FIG. 7 is a view showing a mounted state of the AF support portion 13 and the AF movable portion 11. 7A is a plan view, FIG. 7B is a front view, FIG. 7C is a rear view, FIG. 7D is a left side view, and FIG. 7E is a right side view. In FIGS. 7A to 7E, the coordinate axes are only shown in FIG. 7A. FIG. 8 is a perspective view showing a mounted state of the AF support portion 13 and the AF movable portion 11.
如图6至图8所示，OIS可动部10具备AF可动部11、AF固定部12以及AF用支撑部13等。AF可动部11相对于AF固定部12朝径方向内侧间隔开配置，并通过AF用支撑部13，与AF固定部12连结。As shown in FIGS. 6 to 8 , the OIS movable portion 10 includes an AF movable portion 11 , an AF fixing portion 12 , an AF support portion 13 , and the like. The AF movable portion 11 is disposed to be spaced apart from the AF fixing portion 12 in the radial direction, and is coupled to the AF fixing portion 12 by the AF supporting portion 13 .
AF可动部11具有构成AF用音圈马达的AF用线圈部112，是在对焦时沿光轴方向移动的部分。AF固定部12具有构成AF用音圈马达的AF用磁铁部122A，是借助AF用支撑部13支撑AF可动部11的部分。即，透镜驱动装置1的AF用驱动部采用了可动线圈方式。The AF movable portion 11 has an AF coil portion 112 that constitutes an AF voice coil motor, and is a portion that moves in the optical axis direction at the time of focusing. The AF fixing unit 12 has an AF magnet portion 122A that constitutes an AF voice coil motor, and is a portion that supports the AF movable portion 11 via the AF support portion 13. That is, the AF drive unit of the lens driving device 1 employs a movable coil method.
AF可动部11具有透镜支架111、AF用线圈部112、AF用位置检测部113以及传感器基板114。The AF movable portion 11 has a lens holder 111, an AF coil portion 112, an AF position detecting portion 113, and a sensor substrate 114.
透镜支架111具有圆筒状的透镜收容部111a，透镜部2通过粘结或者螺合而固定于该透镜收容部111a。透镜支架111在沿着X方向的侧面具有配置 AF用线圈部112的线圈安装部111b。另外，透镜支架111在沿着Y方向的两个侧面具有链接安装部111c。The lens holder 111 has a cylindrical lens accommodating portion 111a, and the lens portion 2 is fixed to the lens accommodating portion 111a by adhesion or screwing. The lens holder 111 has a configuration on the side along the X direction The coil attachment portion 111b of the AF coil portion 112. Further, the lens holder 111 has a link mounting portion 111c on both side faces along the Y direction.
AF用线圈部112是在对焦时通电的空心线圈，被卷绕在透镜支架111的线圈安装部111b。AF用线圈部112的线圈的两端连接于传感器基板114。AF用线圈部112具有椭圆形状，且配置成线圈面与光轴平行，在此配置成XZ面为线圈面。AF用线圈部112与磁铁部122(第一磁铁122A)对置。The AF coil portion 112 is an air-core coil that is energized at the time of focusing, and is wound around the coil attachment portion 111b of the lens holder 111. Both ends of the coil of the AF coil portion 112 are connected to the sensor substrate 114. The AF coil portion 112 has an elliptical shape and is disposed such that the coil surface is parallel to the optical axis, and the XZ plane is disposed as a coil surface. The AF coil portion 112 faces the magnet portion 122 (first magnet 122A).
传感器基板114是实装AF用位置检测部113的柔性印制基板。传感器基板114具有：平面部114a，配置在透镜支架111的光轴方向成像侧；以及传感器安装部114b，从平面部114a竖起并弯曲成U字状，且与透镜支架111的线圈安装部111b邻接配置。传感器基板114具有用于向AF用线圈部112和AF用位置检测部113供电的电源线(省略图示)、以及从AF用位置检测部113输出的检测信号用的信号线(省略图示)等。传感器基板114的各布线与底座22的布线电连接。The sensor substrate 114 is a flexible printed board on which the AF position detecting unit 113 is mounted. The sensor substrate 114 has a flat portion 114a disposed on the imaging side in the optical axis direction of the lens holder 111, and a sensor mounting portion 114b that is erected from the flat portion 114a and bent in a U shape, and is coupled to the coil mounting portion 111b of the lens holder 111. Adjacent configuration. The sensor board 114 has a power supply line (not shown) for supplying power to the AF coil unit 112 and the AF position detecting unit 113, and a signal line (not shown) for detecting signals output from the AF position detecting unit 113. Wait. Each wiring of the sensor substrate 114 is electrically connected to the wiring of the chassis 22.
AF用位置检测部113例如是利用霍尔效应来检测磁场的霍尔元件(以下称作“AF用霍尔元件113”)。AF用霍尔元件113主要检测由第一磁铁122A形成的磁场。根据AF用霍尔元件113的检测结果，能够确定出AF可动部11在光轴方向上的位置。AF用霍尔元件113在通过闭环下垂控制进行对焦时被使用。AF用霍尔元件113被实装在传感器基板114的传感器安装部114b。The AF position detecting unit 113 is, for example, a Hall element that detects a magnetic field by a Hall effect (hereinafter referred to as "AF Hall element 113"). The AF Hall element 113 mainly detects the magnetic field formed by the first magnet 122A. According to the detection result of the AF Hall element 113, the position of the AF movable portion 11 in the optical axis direction can be determined. The AF Hall element 113 is used when focusing by the closed loop droop control. The AF Hall element 113 is mounted on the sensor mounting portion 114b of the sensor substrate 114.
这样，AF可动部11具有AF用霍尔元件113(AF用位置检测部)，该AF用霍尔元件113(AF用位置检测部)配置在与臂412的延伸方向交叉的面(图中的XZ面)，根据磁场的变化检测AF可动部11的光轴方向的位置。此外，也可以独立于第一磁铁122A而将位置检测用磁石配置在AF固定部12。In this way, the AF movable portion 11 includes the AF Hall element 113 (AF position detecting unit), and the AF Hall element 113 (AF position detecting unit) is disposed on a surface that intersects with the extending direction of the arm 412 (in the figure) The XZ plane) detects the position of the AF movable portion 11 in the optical axis direction in accordance with the change in the magnetic field. Further, the position detecting magnet may be disposed in the AF fixing portion 12 independently of the first magnet 122A.
在本实施方式中，通过以悬臂状态安装于AF固定部12的AF用支撑部13来支撑AF可动部11。在这种情况下，在与AF用支撑部13的臂412的延伸方向交叉的方向上容易产生振动(共振)。因此，若在沿着臂412的延伸方向的面(图中的YZ面)上配置AF用霍尔元件113，则容易受到因共振造成的位置偏离的影响，有可能会导致AF用霍尔元件113的检测精度下降。对此，在本实施方式中，在与臂412的延伸方向交叉的面上配置AF用霍尔元件113，因此AF用霍尔元件113难以受到因共振造成的位置偏离的影响，能够以高检测精度检测AF可动部11的位置。 In the present embodiment, the AF movable portion 11 is supported by the AF support portion 13 that is attached to the AF fixing portion 12 in a cantilever state. In this case, vibration (resonance) is likely to occur in a direction crossing the extending direction of the arm 412 of the AF support portion 13. Therefore, if the AF Hall element 113 is disposed on the surface (YZ plane in the drawing) along the extending direction of the arm 412, the positional deviation due to resonance is easily affected, and the Hall element for AF may be caused. The detection accuracy of 113 is degraded. On the other hand, in the present embodiment, since the AF Hall element 113 is disposed on the surface that intersects with the extending direction of the arm 412, the AF Hall element 113 is less likely to be affected by the positional deviation due to resonance, and can be detected with high detection. The position of the AF movable portion 11 is detected with accuracy.
AF固定部12具有磁铁支架121以及磁铁部122。The AF fixing portion 12 has a magnet holder 121 and a magnet portion 122.
磁铁部122具有第一磁铁122A以及第二磁铁122B。第一磁铁122A以及第二磁铁122B是两面四极的长方体状的永久磁铁(省略附图标记)。即，在第一磁铁122A以及第二磁铁122B中，在所有六面上等分地呈现出N极与S极。第一磁铁122A以与AF用线圈部112相对置的方式沿X方向配置。第二磁铁122B沿Y方向配置。The magnet portion 122 has a first magnet 122A and a second magnet 122B. The first magnet 122A and the second magnet 122B are rectangular parallelepiped permanent magnets (reference numerals are omitted) having two sides and four poles. That is, in the first magnet 122A and the second magnet 122B, the N pole and the S pole are equally formed on all six faces. The first magnet 122A is disposed in the X direction so as to face the AF coil portion 112. The second magnet 122B is arranged in the Y direction.
AF用线圈部112以及第一磁铁122A的大小和位置被设定成，使在Y方向上穿过AF用线圈部112中的两个长边部分磁场彼此反向。由此，在对AF用线圈部112进行通电时，在AF用线圈部122的两个长边部分，在Z方向上产生同向的洛仑兹力。The size and position of the AF coil portion 112 and the first magnet 122A are set such that the two long side magnetic fields passing through the AF coil portion 112 in the Y direction are opposite to each other. Thereby, when the AF coil portion 112 is energized, the Lorentz force in the same direction is generated in the Z direction on the two long side portions of the AF coil portion 122.
这样，第一磁铁122A(AF用磁铁部)具有两面四极的长方体形状，且沿着X方向(与光轴方向正交的第一方向)配置。AF用线圈部112具有椭圆形状，且配置成线圈面与第一磁铁122A相对置、并且两个长边部分与来自第一磁铁122A的磁通反向交叉。In this way, the first magnet 122A (the magnet portion for AF) has a rectangular parallelepiped shape having two faces and four poles, and is disposed along the X direction (the first direction orthogonal to the optical axis direction). The AF coil portion 112 has an elliptical shape, and is disposed such that the coil surface faces the first magnet 122A, and the two long side portions are opposite to the magnetic flux from the first magnet 122A.
由第一磁铁122A与AF用线圈部112构成AF用音圈马达。另外，由第一磁铁122A以及第二磁铁122B与OIS用线圈部211(参照图9)构成OIS用音圈马达。也就是说，第一磁铁122A兼用作AF用磁铁部与OIS用磁铁部。The first magnet 122A and the AF coil unit 112 constitute an AF voice coil motor. Further, the first magnet 122A and the second magnet 122B and the OIS coil portion 211 (see FIG. 9) constitute an OIS voice coil motor. In other words, the first magnet 122A also serves as the AF magnet portion and the OIS magnet portion.
第一磁铁122A以及第二磁铁122B被用于检测OIS可动部10在光轴正交面内的位置。另外，第一磁铁122A被用于检测AF可动部11在光轴方向上的位置。此外，也可以独立于第一磁铁122A以及第二磁铁122B而在AF固定部12(OIS可动部10)配置位置检测用的磁铁。The first magnet 122A and the second magnet 122B are used to detect the position of the OIS movable portion 10 in the plane orthogonal to the optical axis. In addition, the first magnet 122A is used to detect the position of the AF movable portion 11 in the optical axis direction. Further, a magnet for position detection may be disposed in the AF fixing portion 12 (OIS movable portion 10) independently of the first magnet 122A and the second magnet 122B.
磁铁支架121具有能够收容AF可动部11的空间，且是俯视时呈大致正方形的四方筒体。磁铁支架121在沿着X方向的一个侧壁上具有磁铁收容部121a，在沿着Y方向的一个侧壁上具有磁铁收容部121b。在磁铁收容部121a中配置第一磁铁122A，在磁铁收容部121b中配置第二磁铁122B。The magnet holder 121 has a space in which the AF movable portion 11 can be housed, and is a square tubular body that is substantially square in plan view. The magnet holder 121 has a magnet housing portion 121a on one side wall along the X direction, and a magnet housing portion 121b on one side wall in the Y direction. The first magnet 122A is disposed in the magnet housing portion 121a, and the second magnet 122B is disposed in the magnet housing portion 121b.
磁铁支架121在沿着X方向的另一个侧壁上具有AF用链接固定部121c。AF用链接部件13的磁铁支架固定部131被固定在AF用链接固定部121c。The magnet holder 121 has an AF link fixing portion 121c on the other side wall along the X direction. The magnet holder fixing portion 131 of the AF link member 13 is fixed to the AF link fixing portion 121c.
磁铁支架121在沿着Y方向的两边的各自的端部(计四个部位)具有OIS用链接固定部121d。OIS用链接部件30的第一侧部支撑体31被固定在各个OIS用链接固定部121d。 The magnet holder 121 has an OIS link fixing portion 121d at each end (four locations) on both sides in the Y direction. The first side support body 31 of the OIS link member 30 is fixed to each OIS link fixing portion 121d.
AF用支撑部13相对于AF固定部12支撑AF可动部11。在本实施方式中，作为AF用支撑部13，并非采用以往的板簧，而是与OIS用链接部件30同样地采用利用了弹性体的弹性的链接部件(以下称作“AF用链接部件13”)。AF用链接部件13以悬臂状态被安装在AF固定部12(磁铁支架121)。The AF support portion 13 supports the AF movable portion 11 with respect to the AF fixing portion 12. In the present embodiment, the AF support member 13 is a link member that uses elasticity of the elastic body in the same manner as the OIS link member 30 (hereinafter referred to as "AF link member 13". "). The AF link member 13 is attached to the AF fixing portion 12 (the magnet holder 121) in a cantilever state.
AF用链接部件13具有支撑部本体41以及补强部42。支承部本体41具有磁铁支架固定部411、臂412以及透镜支架固定部413。The AF link member 13 has a support portion body 41 and a reinforcing portion 42. The support body 41 has a magnet holder fixing portion 411, an arm 412, and a lens holder fixing portion 413.
磁铁支架固定部411具有与磁铁支架121的AF用链接固定部121c相对应的形状。磁铁支架固定部411具有用于插入透镜支架111的限制套管111d的套管收容部411a。透镜支架固定部413具有与透镜支架111的链接安装部111c相对应的缺口部413a。The magnet holder fixing portion 411 has a shape corresponding to the AF link fixing portion 121c of the magnet holder 121. The magnet holder fixing portion 411 has a sleeve housing portion 411a for inserting the restriction sleeve 111d of the lens holder 111. The lens holder fixing portion 413 has a notch portion 413a corresponding to the link mounting portion 111c of the lens holder 111.
臂412由弹性体材料形成。臂412具有沿着透镜支架收容部111a的周面的弯曲形状。两条臂412(第一臂以及第二臂)分别具有在光轴方向上间隔开设置的上侧臂412A和下侧臂412B。上侧臂412A和下侧臂412B的基端部连接在磁铁支架固定部411，并间接地固定于AF固定部12。上侧臂412A和下侧臂412B的前端部通过透镜支架固定部413连结。The arm 412 is formed from an elastomeric material. The arm 412 has a curved shape along the circumferential surface of the lens holder accommodating portion 111a. The two arms 412 (the first arm and the second arm) respectively have an upper arm 412A and a lower arm 412B which are spaced apart in the optical axis direction. The base end portions of the upper arm 412A and the lower arm 412B are connected to the magnet holder fixing portion 411 and indirectly fixed to the AF fixing portion 12. The front end portions of the upper arm 412A and the lower arm 412B are coupled by the lens holder fixing portion 413.
上侧臂412A以及下侧臂412B具有双轴铰链结构，该双轴铰链结构通过使两个轴朝中心弯曲，能够使AF可动部11平行移动。通过采用利用了弹性体的弹性的机械铰链结构，能够用较小的力使AF可动部11移动，因此能够实现省电化。The upper arm 412A and the lower arm 412B have a biaxial hinge structure that can move the AF movable portion 11 in parallel by bending the two shafts toward the center. By adopting the mechanical hinge structure using the elasticity of the elastic body, the AF movable portion 11 can be moved with a small force, so that power saving can be achieved.
具体而言，上侧臂412A以及下侧臂412B具有厚度形成为比周围薄且以X方向为轴的两个铰链部412a、412b。在此，铰链部412a、412b由在上侧臂412A以及下侧臂412B的内表面形成为锐角的铰链槽构成。铰链槽的形状并无特别限制，但优选具有R形状。Specifically, the upper arm 412A and the lower arm 412B have two hinge portions 412a and 412b whose thickness is thinner than the circumference and whose axis is the X direction. Here, the hinge portions 412a and 412b are formed by hinge grooves formed at an acute angle on the inner surfaces of the upper arm 412A and the lower arm 412B. The shape of the hinge groove is not particularly limited, but preferably has an R shape.
补强部42在臂412中配置于两个铰链部412a、412b之间。补强部42由刚性比弹性体材料高的材料、即热膨胀率较小的材料形成。例如，通过对金属片(例如不锈钢片)进行嵌件成型来形成补强部42。另外，例如补强部42通过树脂材料(例如液晶聚合物)的双色成型来形成。The reinforcing portion 42 is disposed between the two hinge portions 412a and 412b in the arm 412. The reinforcing portion 42 is formed of a material having a higher rigidity than the elastomer material, that is, a material having a small coefficient of thermal expansion. For example, the reinforcing portion 42 is formed by insert molding a metal piece such as a stainless steel piece. Further, for example, the reinforcing portion 42 is formed by two-color molding of a resin material (for example, a liquid crystal polymer).
此外，补强部42的大小只要是能够抑制AF可动部11的共振的程度即可。极端地说，铰链部412a与铰链部412b之间可以都是补强部42。Further, the size of the reinforcing portion 42 may be such a degree that the resonance of the AF movable portion 11 can be suppressed. In an extreme, the reinforcing portion 42 may be provided between the hinge portion 412a and the hinge portion 412b.
由于弹性体材料的热膨胀率比较大，因此周围温度越高，臂412沿延伸 方向伸长得越长。当臂412变长时，会变得容易受到共振的影响。另外，AF可动部11在光轴正交面内的位置将偏离相当于伸长长度的距离，因此无法进行确切地抖动修正而导致画面质量下降。虽然可以在考虑臂412的伸长的基础上进行抖动修正，但是运算处理复杂，处理负担会增大，因此并非优选。Since the thermal expansion rate of the elastomer material is relatively large, the higher the ambient temperature, the extension of the arm 412 The longer the direction is elongated. When the arm 412 becomes long, it becomes susceptible to resonance. Further, since the position of the AF movable portion 11 in the plane orthogonal to the optical axis deviates from the distance corresponding to the elongation length, accurate shake correction cannot be performed, and the picture quality is degraded. Although the shake correction can be performed in consideration of the elongation of the arm 412, the arithmetic processing is complicated and the processing load is increased, which is not preferable.
对此，在本实施方式中，由于在臂412中配置有补强部42，因此，与由弹性体材料形成整个臂412的情况相比，刚性得到提高。由此，AF用链接部件13在臂延伸方向上的伸长变小，因此，多余共振的频率变高，共振峰值也会变小(参照图13)。图13是表示AF用位置检测部113的频率特性的图。如图13所示，在配置有补强部42的情况下，在1kHz附近产生的共振向高频迁移，共振峰值显著变小。另外，还可抑制AF可动部11在光轴正交面内的位置偏离。因此，根据AF用位置检测部113以及OIS用位置检测部23的检测信号进行闭环下垂控制时的稳定性得到提高，透镜驱动装置1的可靠性得到提高。On the other hand, in the present embodiment, since the reinforcing portion 42 is disposed in the arm 412, the rigidity is improved as compared with the case where the entire arm 412 is formed of an elastic material. Thereby, the elongation of the AF link member 13 in the arm extending direction is reduced, so that the frequency of the unnecessary resonance is increased, and the resonance peak is also small (see FIG. 13). FIG. 13 is a view showing frequency characteristics of the AF position detecting unit 113. As shown in FIG. 13, when the reinforcing portion 42 is disposed, the resonance generated in the vicinity of 1 kHz shifts to the high frequency, and the resonance peak significantly decreases. Further, it is possible to suppress the positional deviation of the AF movable portion 11 in the plane orthogonal to the optical axis. Therefore, the stability at the time of performing the closed loop droop control based on the detection signals of the AF position detecting unit 113 and the OIS position detecting unit 23 is improved, and the reliability of the lens driving device 1 is improved.
透镜支架111被配置成位于臂412的内侧。在透镜支架111的链接安装部111c嵌合并粘结AF用链接部件13的缺口部413a，从而连结透镜支架111与AF用链接部件13。由于AF用链接部件13靠近透镜支架111的侧面配置，因此能够抑制透镜驱动装置1的俯视尺寸，并且能够以稳定的状态支撑AF可动部11。The lens holder 111 is configured to be located inside the arm 412. The notch portion 413a of the AF link member 13 is fitted and bonded to the link attachment portion 111c of the lens holder 111, thereby coupling the lens holder 111 and the AF link member 13. Since the AF link member 13 is disposed close to the side surface of the lens holder 111, it is possible to suppress the plan view size of the lens driving device 1 and to support the AF movable portion 11 in a stable state.
另外，透镜支架111的限制套管111d被插入到AF用链接部件13的套管收容部411a中。限制套管111d作为对AF可动部11朝向光轴方向的移动进行限制的限制部发挥其功能。即，当AF可动部11沿光轴方向移动时，限制套管111d的上端(光轴方向受光侧的端部)或者下端(光轴方向成像侧的端部)抵接到套管收容部411a，从而限制更大的移动。Further, the restriction sleeve 111d of the lens holder 111 is inserted into the sleeve accommodating portion 411a of the AF link member 13. The restriction sleeve 111d functions as a restriction portion that restricts the movement of the AF movable portion 11 in the optical axis direction. In other words, when the AF movable portion 11 moves in the optical axis direction, the upper end of the restriction sleeve 111d (the end on the light-receiving side in the optical axis direction) or the lower end (the end on the imaging-side side in the optical axis direction) abuts against the sleeve accommodating portion. 411a, thereby limiting greater movement.
限制套管111d与套管收容部411a的间隙通过阻尼材料115密封。由此，能够进一步降低AF可动部11的共振级别。The gap between the restriction sleeve 111d and the sleeve housing portion 411a is sealed by the damping material 115. Thereby, the resonance level of the AF movable portion 11 can be further reduced.
这样，支撑部本体41具有：磁铁支架固定部411(固定端)，连接于AF固定部12；透镜支架固定部413(自由端)，连接于AF可动部11；以及臂，连结磁铁支架固定部411与透镜支架固定部413。臂412由弹性体材料形成，并具有厚度形成为比周围薄且以X轴(与光轴方向正交的方向)为轴的两个铰链部412a、412b，并且伴随着AF可动部11朝向光轴方向的移动，以铰链 部412a、412b处的弯曲方向彼此为相反方向的方式弯曲(参照图11)。由此，使相对于自动聚焦时反复进行的弯曲动作的耐久性得到提高，并且因下落等的冲击导致破损的危险性变得极低。Thus, the support portion body 41 has a magnet holder fixing portion 411 (fixed end) connected to the AF fixing portion 12, a lens holder fixing portion 413 (free end) connected to the AF movable portion 11, and an arm coupled to the magnet holder. The portion 411 and the lens holder fixing portion 413. The arm 412 is formed of an elastomer material and has two hinge portions 412a, 412b formed to be thinner than the circumference and having an X-axis (a direction orthogonal to the optical axis direction), and is accompanied by the AF movable portion 11 Movement in the direction of the optical axis, with a hinge The bending directions at the portions 412a and 412b are curved in opposite directions from each other (see FIG. 11). Thereby, the durability against the bending operation repeated at the time of auto focusing is improved, and the risk of breakage due to an impact such as dropping is extremely low.
图9是OIS固定部20的分解立体图。如图9所示，OIS固定部20具备线圈基板21、底座22以及OIS用位置检测部23等。FIG. 9 is an exploded perspective view of the OIS fixing portion 20. As shown in FIG. 9 , the OIS fixing unit 20 includes a coil substrate 21 , a base 22 , an OIS position detecting unit 23 , and the like.
线圈基板21是在俯视时呈L字状的基板。通过将线圈基板21设置成L字形状，使矩形状的基板的穴数增加，因此能够实现成本的降低。The coil substrate 21 is a substrate having an L shape in plan view. By providing the coil substrate 21 in an L shape, the number of holes of the rectangular substrate is increased, so that cost reduction can be achieved.
线圈基板21在光轴方向上与磁铁部122相对置的位置具有OIS用线圈部211。OIS用线圈部211具有与第一磁铁122A以及第二磁铁122B相对应的第一OIS线圈211A以及第二OIS线圈211B。The coil substrate 21 has an OIS coil portion 211 at a position facing the magnet portion 122 in the optical axis direction. The OIS coil portion 211 has a first OIS coil 211A and a second OIS coil 211B corresponding to the first magnet 122A and the second magnet 122B.
第一OIS线圈211A由椭圆形状的两个平面线圈形成。第一OIS线圈211A被配置成，线圈面与第一磁铁122A的光轴方向成像侧的面相对置。第二OIS线圈122B由椭圆形状的两个平面线圈形成。第二OIS线圈211B被配置成，线圈面与第二磁铁122B的光轴方向成像侧的面相对置。The first OIS coil 211A is formed of two planar coils of an elliptical shape. The first OIS coil 211A is disposed such that the coil surface faces the surface on the imaging side of the optical axis direction of the first magnet 122A. The second OIS coil 122B is formed of two planar coils of an elliptical shape. The second OIS coil 211B is disposed such that the coil surface faces the surface on the imaging side of the optical axis direction of the second magnet 122B.
OIS用线圈部211以及磁铁部122的大小和位置被设定成，使反向的磁场在Z方向上穿过各个OIS线圈211中的两个长边部分。由此，在对OIS用线圈部211进行通电时，在OIS用线圈部211的两个长边部分，在X方向或者Y方向上产生同向的洛仑兹力。The size and position of the OIS coil portion 211 and the magnet portion 122 are set such that the reverse magnetic field passes through the two long side portions of the respective OIS coils 211 in the Z direction. Thus, when the OIS coil portion 211 is energized, the Lorentz force in the X direction or the Y direction is generated in the two long side portions of the OIS coil portion 211.
底座22是在俯视时呈正方形状的部件，在中央具有圆形的开口22a。底座22在开口22a的周缘具有竖立壁22b。通过竖立壁22b，相对于底座22进行线圈基板的定位。The base 22 is a member having a square shape in plan view, and has a circular opening 22a at the center. The base 22 has a standing wall 22b at the periphery of the opening 22a. The positioning of the coil substrate is performed with respect to the base 22 by the upright wall 22b.
在底座22上实装OIS用位置检测部23。OIS用位置检测部23例如是利用霍尔效应来检测磁场的霍尔元件(以下称作“OIS用霍尔元件23”)。在底座22相邻的两条边上，在各自的大致中央即OIS线圈211的隔开部分，对应地配置OIS用霍尔元件23。The OIS position detecting portion 23 is mounted on the base 22. The OIS position detecting unit 23 is, for example, a Hall element that detects a magnetic field by a Hall effect (hereinafter referred to as "OIS Hall element 23"). On the two adjacent sides of the base 22, the OIS Hall element 23 is disposed correspondingly at a substantially central portion of each of the OIS coils 211.
OIS用霍尔元件23主要检测由磁铁部122形成的磁场。根据OIS用霍尔元件23的检测结果，能够确定出OIS可动部10在光轴正交面内的位置。此外，也可以独立于磁铁部122而将位置检测用磁石配置在OIS可动部10。The OIS Hall element 23 mainly detects the magnetic field formed by the magnet portion 122. According to the detection result of the OIS Hall element 23, the position of the OIS movable portion 10 in the plane orthogonal to the optical axis can be determined. Further, the position detecting magnet may be disposed in the OIS movable portion 10 independently of the magnet portion 122.
底座22具有用于向AF用线圈部112、OIS用线圈部211、AF用位置检测部113和OIS用位置检测部23供电的电源线(省略图示)、以及从AF用位 置检测部113、OIS用位置检测部23输出的检测信号用的信号线(省略图示)等。这些布线例如通过嵌件成型埋设在底座22内部。由此，能够省去实装OIS用位置检测部23的印刷布线基板，因此能够实现摄像机模块的小型化、轻量化。The base 22 has a power supply line (not shown) for supplying power to the AF coil unit 112, the OIS coil unit 211, the AF position detecting unit 113, and the OIS position detecting unit 23, and the AF position. A signal line (not shown) for detecting a signal output from the detection unit 113 and the OIS position detecting unit 23 is placed. These wirings are buried inside the base 22, for example, by insert molding. Thereby, the printed wiring board on which the position detecting unit 23 for OIS is mounted can be omitted, so that the size and weight of the camera module can be reduced.
在透镜驱动装置1中，当对OIS用线圈部211通电时，基于磁铁部122的磁场与流向OIS用线圈部211的电流的相互作用，在OIS用线圈部211中产生洛仑兹力(弗莱明左手法则)。洛仑兹力的方向是与磁场的方向(Z方向)和流向OIS用线圈部211的长边部分的电流的方向(X方向或者Y方向)正交的方向(Y方向或者X方向)。In the lens driving device 1, when the OIS coil portion 211 is energized, the Lorentz force is generated in the OIS coil portion 211 by the interaction between the magnetic field of the magnet portion 122 and the current flowing to the OIS coil portion 211. Lemming's left-hand rule). The direction of the Lorentz force is a direction (Y direction or X direction) orthogonal to the direction of the magnetic field (Z direction) and the direction (X direction or Y direction) of the current flowing to the long side portion of the OIS coil portion 211.
由于OIS用线圈部211被固定，因此反作用力作用于磁铁部122。该反作用力成为OIS用音圈马达的驱动力，具有磁铁部122的OIS可动部10在XY平面内摆动，从而进行抖动修正。具体而言，以使摄像机模块A的角度抖动相互抵消的方式，根据来自抖动检测部(例如陀螺仪传感器，省略图示)的表示角度抖动的检测信号，控制抖动修正用线圈部211的通电电流。此时，通过反馈OIS用位置检测部23的检测结果，能够准确控制OIS可动部10的平移移动。Since the OIS coil portion 211 is fixed, a reaction force acts on the magnet portion 122. This reaction force is the driving force of the OIS voice coil motor, and the OIS movable portion 10 having the magnet portion 122 is swung in the XY plane to perform shake correction. Specifically, the energization current of the shake correction coil unit 211 is controlled based on a detection signal indicating the angle shake from the shake detection unit (for example, a gyro sensor, not shown) so that the angular shake of the camera module A cancels each other. . At this time, by feeding back the detection result of the OIS position detecting unit 23, the translational movement of the OIS movable portion 10 can be accurately controlled.
当如图10A所示那样通过对OIS用线圈部211通电而使X方向的力作用于OIS可动部10时，如图10B所示，OIS用链接部件30的第一侧部支撑体31弯曲。即，如图10B所示，第一侧部支撑体31的位于Y铰链部31a下方的部分与OIS可动部10(磁铁支架121)一起沿X方向移动，但位于Y铰链部31b上方的部分由于经由上部框体33以及第二侧部支撑体32间接地连接在OIS固定部20上，因此不移动。因此，第一侧部支撑体31以Y铰链部31a、31b处的弯曲方向为相反方向的方式弯曲。When the OIS coil portion 211 is energized and the X-direction force is applied to the OIS movable portion 10 as shown in FIG. 10A, the first side support body 31 of the OIS link member 30 is bent as shown in FIG. 10B. . That is, as shown in FIG. 10B, the portion of the first side support 31 below the Y hinge portion 31a moves together with the OIS movable portion 10 (the magnet holder 121) in the X direction, but the portion above the Y hinge portion 31b. Since it is indirectly connected to the OIS fixing portion 20 via the upper housing 33 and the second side support 32, it does not move. Therefore, the first side support body 31 is curved in such a manner that the bending directions at the Y hinge portions 31a and 31b are opposite directions.
另一方面，当如图11A所示那样通过对OIS用线圈部211通电而使Y方向的力作用于OIS可动部10时，如图11B所示，OIS用链接部件30的第二侧部支撑体32弯曲。即，第二侧部支撑体32的位于X铰链部32a上方的部分与OIS可动部10(磁铁支架121)一起沿Y方向移动，但位于X铰链部32b下方的部分由于连接在OIS固定部20的底座22上，因此不移动。因此，第二侧部支撑体32以X铰链部32a、32b处的弯曲方向为相反方向的方式弯曲。On the other hand, when the OIS coil portion 211 is energized and the Y-direction force acts on the OIS movable portion 10 as shown in FIG. 11A, as shown in FIG. 11B, the second side portion of the OIS link member 30 is used. The support body 32 is curved. That is, the portion of the second side support 32 above the X hinge portion 32a moves in the Y direction together with the OIS movable portion 10 (the magnet holder 121), but the portion located below the X hinge portion 32b is connected to the OIS fixing portion. 20 is on the base 22 and therefore does not move. Therefore, the second side support 32 is curved such that the bending directions at the X hinge portions 32a and 32b are opposite directions.
另外，在透镜驱动装置1中，当对AF用线圈部112通电时，基于第一磁 铁122A的磁场与流向AF用线圈部112的电流的相互作用，在AF用线圈部112中产生洛仑兹力。洛仑兹力的方向是与磁场的方向(Y方向)和流向AF用线圈部112的电流的方向(X方向)正交的方向(Z方向)。该力成为AF用音圈马达的驱动力，具有AF用线圈部112的AF可动部11沿光轴方向移动，从而进行对焦。例如通过下述方式调整合焦位置，即一边使AF可动部11移动一边分析由摄像部(省略图示)获取的多个图像信息，并进行对比度评价。Further, in the lens driving device 1, when the AF coil portion 112 is energized, based on the first magnetic The interaction between the magnetic field of the iron 122A and the current flowing to the AF coil portion 112 generates a Lorentz force in the AF coil portion 112. The direction of the Lorentz force is a direction (Z direction) orthogonal to the direction of the magnetic field (Y direction) and the direction of the current flowing to the AF coil portion 112 (X direction). This force becomes the driving force of the AF voice coil motor, and the AF movable portion 11 having the AF coil portion 112 moves in the optical axis direction to perform focusing. For example, the focus position is adjusted by analyzing the plurality of pieces of image information acquired by the imaging unit (not shown) while moving the AF movable unit 11 and performing contrast evaluation.
此外，在不进行对焦的未通电时，AF可动部11通过AF用链接部件13保持被吊在无限远位置与微距位置之间的状态(以下称作“基准状态”)。即，在OIS可动部10中，AF可动部11(透镜支架111)通过AF用链接部件13，在相对于AF固定部12(磁铁支架121)被定位的状态下，以能够朝Z方向两侧位移的方式受到支撑。在进行对焦时，根据是使AF可动部11从基准状态朝微距位置侧移动还是朝无限远位置侧移动，来控制电流的方向。另外，根据AF可动部11的移动距离来控制电流的大小。Further, when the power is not applied, the AF movable portion 11 is held by the AF link member 13 in a state of being suspended between the infinity position and the macro position (hereinafter referred to as "reference state"). In other words, in the OIS movable portion 10, the AF movable portion 11 (lens holder 111) passes through the AF link member 13 and is positioned in the Z direction with respect to the AF fixing portion 12 (the magnet holder 121). The way of displacement on both sides is supported. At the time of focusing, the direction of the current is controlled in accordance with whether the AF movable portion 11 is moved from the reference state toward the macro position side or toward the infinity position side. Further, the magnitude of the current is controlled in accordance with the moving distance of the AF movable portion 11.
当如图12A所示那样通过对AF用线圈部112通电而使Z方向的力作用于AF可动部11时，如图12B所示，AF用链接部件13的臂412弯曲。即，如图13B所示，臂412的位于铰链部412b左侧的部分与AF可动部11一起沿Z方向移动，但位于铰链部412a右侧的部分由于经由磁铁支架固定部131连接在AF固定部12上，因此不移动。因此，臂412以铰链部412a、412b处的弯曲方向为相反方向的方式弯曲。When the force in the Z direction is applied to the AF movable portion 11 by energizing the AF coil portion 112 as shown in FIG. 12A, the arm 412 of the AF link member 13 is bent as shown in FIG. 12B. That is, as shown in Fig. 13B, the portion of the arm 412 located on the left side of the hinge portion 412b moves in the Z direction together with the AF movable portion 11, but the portion located on the right side of the hinge portion 412a is connected to the AF by the magnet holder fixing portion 131. It is fixed on the fixed portion 12 and therefore does not move. Therefore, the arm 412 is curved in such a manner that the bending directions at the hinge portions 412a, 412b are opposite directions.
这样，透镜驱动装置1具备抖动修正用驱动部，该抖动修正用驱动部具有：磁铁部122(抖动修正用磁铁部)，配置在透镜部2周围；OIS用线圈部211(抖动修正用线圈部)，从磁铁部122间隔开配置；以及OIS用支撑部30(抖动修正用支撑部)，相对于包含OIS用线圈部211的OIS固定部20(抖动修正固定部)，以在光轴方向上间隔开的状态支撑包含磁铁部122的OIS可动部10(抖动修正可动部)，该抖动修正用驱动部利用由OIS用线圈部211和磁铁部122构成的OIS用音圈马达的驱动力，使OIS可动部10在与光轴方向正交的平面内相对于OIS固定部20摆动，从而进行抖动修正。OIS可动部10包含自动聚焦用驱动部，该自动聚焦用驱动部具有：AF用线圈部112(自动聚焦用线圈部)，配置在透镜部2周围；第一磁铁122A(自动聚焦用磁铁 部)，相对于AF用线圈部112在径方向上间隔开配置；以及AF用支撑部13(自动聚焦用支撑部)，相对于包含第一磁铁122A的AF固定部12(自动聚焦固定部)，支撑包含AF用线圈部112的AF可动部11(自动聚焦可动部)，该自动聚焦用驱动部利用由AF用线圈部112和第一磁铁122A构成的AF用音圈马达的驱动力，使AF可动部11沿光轴方向相对于AF固定部12移动，从而自动进行对焦。OIS用支撑部30具有双轴铰链结构，该双轴铰链结构由弹性体材料形成，且在与光轴正交的面内可移动地支撑OIS可动部10。AF用支撑部13具有支撑部本体41和补强部42。支撑部本体41具有：磁铁支架固定部411(固定端)，连接于AF固定部12；透镜支架固定部413(自由端)，连接于AF可动部11；以及臂412，连结磁铁支架固定部411与透镜支架固定部413。臂412由弹性体材料形成，并具有厚度形成为比周围薄且以与光轴方向正交的方向为轴的两个铰链部412a、412b。伴随着AF可动部11朝向光轴方向的移动，臂412以两个铰链部412a、412b处的弯曲方向彼此为相反方向的方式弯曲。补强部42由刚性比弹性体材料高的材料形成，且配置在臂412的两个铰链部412a、412b之间。In this way, the lens driving device 1 includes a shake correction drive unit including a magnet portion 122 (shake correction magnet portion) disposed around the lens portion 2 and an OIS coil portion 211 (shake correction coil portion). And the OIS support portion 30 (shake correction support portion) is disposed in the optical axis direction with respect to the OIS fixing portion 20 (jitter correction fixing portion) including the OIS coil portion 211. The OIS movable portion 10 (jitter correction movable portion) including the magnet portion 122 is supported by the driving force of the OIS voice coil motor composed of the OIS coil portion 211 and the magnet portion 122. The OIS movable portion 10 is swung with respect to the OIS fixing portion 20 in a plane orthogonal to the optical axis direction to perform shake correction. The OIS movable portion 10 includes an autofocus driving unit including an AF coil unit 112 (autofocus coil unit) disposed around the lens unit 2, and a first magnet 122A (autofocus magnet) The AF support coil portion 112 is spaced apart from each other in the radial direction; and the AF support portion 13 (autofocus support portion) is attached to the AF fixing portion 12 (autofocus fixing portion) including the first magnet 122A. The AF movable portion 11 (automatic focus movable portion) including the AF coil portion 112 that supports the driving force of the AF voice coil motor including the AF coil portion 112 and the first magnet 122A is supported. The AF movable portion 11 is moved relative to the AF fixing portion 12 in the optical axis direction to automatically perform focusing. The OIS support portion 30 has a biaxial hinge structure formed of an elastomer material and movably supports the OIS movable portion 10 in a plane orthogonal to the optical axis. The AF support portion 13 has a support portion body 41 and a reinforcing portion 42. The support portion body 41 has a magnet holder fixing portion 411 (fixed end) connected to the AF fixing portion 12, a lens holder fixing portion 413 (free end) connected to the AF movable portion 11, and an arm 412 connecting the magnet holder fixing portion 411 and lens holder fixing portion 413. The arm 412 is formed of an elastomer material and has two hinge portions 412a, 412b whose thickness is formed to be thinner than the circumference and whose axis is orthogonal to the optical axis direction. Along with the movement of the AF movable portion 11 in the optical axis direction, the arm 412 is curved such that the bending directions of the two hinge portions 412a and 412b are opposite to each other. The reinforcing portion 42 is formed of a material having a higher rigidity than the elastomer material, and is disposed between the two hinge portions 412a, 412b of the arm 412.
根据透镜驱动装置1，因下落等的冲击导致抖动修正用支撑部和自动聚焦用支撑部发生破损的危险性变得极低。另外，与以往相比，结构简单，部件数量也少。进一步，能够显著地减少AF可动部11受到的共振的影响。因此，能够确保高可靠性，并且能够提高OIS灵敏度，而且还能够使装配作业简化。According to the lens driving device 1, the risk of damage to the shake correction support portion and the autofocus support portion due to an impact such as dropping is extremely low. In addition, compared with the past, the structure is simple and the number of components is small. Further, the influence of the resonance received by the AF movable portion 11 can be remarkably reduced. Therefore, high reliability can be ensured, OIS sensitivity can be improved, and assembly work can be simplified.
另外，由于透镜驱动装置1仅在相邻的两条边上配置有磁铁部122，因此，通过将两个透镜驱动装置1以翻转180°的状态设置，能够使彼此的磁铁部122远离。因此，能够实现磁场干涉较少的双镜头摄像机。Further, since the lens driving device 1 has the magnet portions 122 disposed only on the adjacent two sides, the magnet portions 122 can be separated from each other by providing the two lens driving devices 1 in a state of being reversed by 180 degrees. Therefore, a two-lens camera with less magnetic field interference can be realized.
以上，基于实施方式对由本发明人完成的发明进行了具体说明，但本发明并不限定于上述实施方式，能够在不脱离其宗旨的范围内进行变更。The invention made by the inventors of the present invention has been specifically described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and modifications can be made without departing from the spirit and scope of the invention.
例如，OIS用支撑部30以及AF用支撑部13只要由弹性体材料形成、并具有双轴铰链结构即可，并不限定于实施方式中示出的支撑结构。For example, the OIS support portion 30 and the AF support portion 13 are not limited to the support structure shown in the embodiment as long as they are formed of an elastomer material and have a biaxial hinge structure.
另外，例如，对OIS可动部10在光轴正交面内的位置进行检测的OIS用位置检测部23可以被实装在与底座22电连接的传感器基板上。Further, for example, the OIS position detecting unit 23 that detects the position of the OIS movable portion 10 in the orthogonal plane of the optical axis can be mounted on the sensor substrate that is electrically connected to the chassis 22.
另外，如图14所示，例如第一OIS用线圈211A以及第二OIS用线圈211B可以具有由椭圆状的上侧线圈层211a(第一线圈层)和在长度方向上将上侧 线圈层211a分割成两个的下侧线圈层211b(第二线圈层)组成的双层结构。上侧线圈层211a和下侧线圈层211b例如由一根线圈形成，流经的电流的方向相同。此外，上侧线圈层211a与下侧线圈层211b也可以由不同的线圈形成。在这种情况下，以使流经的电流的方向相同的方式进行布线。OIS用霍尔元件23配置在与下侧线圈层211b的分割部分相对应的位置。所谓“与分割部分相对应的位置”，当然包括分割部分之间，还包括沿光轴方向偏离分割部分的位置。Further, as shown in FIG. 14, for example, the first OIS coil 211A and the second OIS coil 211B may have an elliptical upper coil layer 211a (first coil layer) and an upper side in the longitudinal direction. The coil layer 211a is divided into a two-layer structure composed of two lower coil layers 211b (second coil layers). The upper coil layer 211a and the lower coil layer 211b are formed, for example, by one coil, and the direction of the current flowing therethrough is the same. Further, the upper coil layer 211a and the lower coil layer 211b may be formed of different coils. In this case, wiring is performed in such a manner that the direction of the current flowing through is the same. The OIS Hall element 23 is disposed at a position corresponding to the divided portion of the lower coil layer 211b. The "position corresponding to the divided portion" of course includes between the divided portions, and includes a position deviating from the divided portion in the optical axis direction.
如图15所示，当箭头方向的电流I流向上侧线圈层211a以及下侧线圈层211b时，上侧线圈层211a的磁场B1从下向上穿过OIS用霍尔元件23。另一方面，下侧线圈层211b的磁场B2从上向下穿过OIS用霍尔元件23。因此，由上侧线圈层211a以及下侧线圈层211b在OIS用霍尔元件23周围形成的磁场相互抵消。As shown in FIG. 15, when the current I in the direction of the arrow flows to the upper coil layer 211a and the lower coil layer 211b, the magnetic field B1 of the upper coil layer 211a passes through the OIS Hall element 23 from the bottom to the top. On the other hand, the magnetic field B2 of the lower coil layer 211b passes through the OIS Hall element 23 from the top to the bottom. Therefore, the magnetic fields formed around the OIS Hall element 23 by the upper coil layer 211a and the lower coil layer 211b cancel each other.
由此，在对OIS用线圈部211进行通电时，即使在OIS用线圈部211中产生磁场，入射到OIS用霍尔元件23的磁通也会变少，因此可抑制OIS用线圈部211的磁场对OIS用霍尔元件23造成的影响。即，电谐振被抑制，而且，即使在以150至200Hz进行反馈控制的情况下，低频带中的增益也得到提高。因此，使OIS用霍尔元件23的检测敏感度得到提高，OIS驱动部的建立时间也变短，使抖动修正的精度也得到提高。Therefore, when the OIS coil portion 211 is energized, even if a magnetic field is generated in the OIS coil portion 211, the magnetic flux incident on the OIS Hall element 23 is reduced, so that the OIS coil portion 211 can be suppressed. The effect of the magnetic field on the OIS Hall element 23. That is, the electrical resonance is suppressed, and even in the case of performing feedback control at 150 to 200 Hz, the gain in the low frequency band is improved. Therefore, the detection sensitivity of the OIS Hall element 23 is improved, the setup time of the OIS drive unit is also shortened, and the accuracy of the shake correction is also improved.
另外，由于上侧线圈层211a未被分割，因此，与将OIS用线圈部211整体设置成分割结构的情况相比，在OIS用线圈部211中产生较大的洛仑兹力。因此，使抖动修正的敏感度也得到提高。In addition, since the upper coil layer 211a is not divided, a larger Lorentz force is generated in the OIS coil portion 211 than in the case where the entire OIS coil portion 211 is provided in a divided configuration. Therefore, the sensitivity of the shake correction is also improved.
另外，在将金属材料应用到埋设于AF用支撑部13的臂412中的补强部42时，可以将其用作AF用线圈部112以及AF用霍尔元件113的供电线或者信号线。在这种情况下，由于补强部42与底座22的布线之间、以及补强部42与AF用线圈部112和AF用霍尔元件113之间电连接，因此，能够利用例如高柔软性的弹性配线。In addition, when the metal material is applied to the reinforcing portion 42 embedded in the arm 412 of the AF support portion 13, it can be used as a power supply line or a signal line of the AF coil portion 112 and the AF Hall element 113. In this case, since the wiring between the reinforcing portion 42 and the chassis 22 and the reinforcing portion 42 are electrically connected to the AF coil portion 112 and the AF Hall element 113, for example, high flexibility can be utilized. Flexible wiring.
在实施方式中，作为具备摄像机模块A的摄像机搭载装置的一例，列举作为带有摄像机的便携终端的智能手机进行了说明，但本发明能够适用于作为信息设备或者运输设备的摄像机搭载装置。所谓作为信息设备的摄像机搭载装置，是指具有对摄像机模块和由摄像机模块获得的图像信息进行处理的 控制部的信息设备，例如包括带摄像机的便携电话、笔记本电脑、平板终端、便携式游戏机、web摄像机、带摄像机的车载装置(例如后方监控装置、行车记录仪装置)。另外，所谓作为运输设备的摄像机搭载装置，是指具有对摄像机模块和由摄像机模块获得的图像进行处理的控制部的运输设备，例如包括汽车。In the embodiment, as an example of the camera-mounted device including the camera module A, a smartphone as a portable terminal with a camera has been described. However, the present invention can be applied to a camera-mounted device as an information device or a transportation device. The camera-mounted device as an information device means that the camera module and the image information obtained by the camera module are processed. The information device of the control unit includes, for example, a mobile phone with a camera, a notebook computer, a tablet terminal, a portable game machine, a web camera, and an in-vehicle device with a camera (for example, a rear monitoring device and a driving recorder device). In addition, the camera mounting device as a transportation device refers to a transportation device having a control unit that processes a camera module and an image obtained by the camera module, and includes, for example, an automobile.
图16是表示作为搭载摄像机模块VC(Vehicle Camera，车用摄像机)的摄像机搭载装置的汽车V的图。图16A为汽车V的前视图，图16B为汽车V的后方立体图。汽车V搭载实施方式中说明的摄像机模块A，以作为车载用摄像机模块VC。如图16所示，车载用摄像机模块VC例如朝向前方安装于挡风玻璃，或者朝向后方安装于尾门。该车载用摄像机模块VC作为后方监控用、行车记录仪用、碰撞避免控制用、自动驾驶控制用等而被使用。FIG. 16 is a view showing a car V as a camera mounting device on which a camera module VC (Vehicle Camera) is mounted. 16A is a front view of the automobile V, and FIG. 16B is a rear perspective view of the automobile V. The car V is mounted with the camera module A described in the embodiment as the in-vehicle camera module VC. As shown in FIG. 16, the vehicle-mounted camera module VC is attached to the windshield toward the front, for example, or is attached to the tailgate toward the rear. This in-vehicle camera module VC is used as a rear monitoring, a driving recorder, collision avoidance control, automatic driving control, and the like.
应该认为此次公开的实施方式在所有方面均为例示，而非用于限制。本发明的范围并非由上述说明表示，而是由权利要求书表示，并且还包括与权利要求书等同的含义及范围内的所有变更。 The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the scope of the claims and the claims

Claims (6)

  1. 一种透镜驱动装置，其特征在于，A lens driving device, characterized in that
    具备抖动修正用驱动部，该抖动修正用驱动部具有：抖动修正用磁铁部，配置在透镜部周围；抖动修正用线圈部，从所述抖动修正用磁铁部间隔开配置；以及抖动修正用支撑部，相对于包含所述抖动修正用线圈部的抖动修正固定部，以在光轴方向上间隔开的状态支撑包含所述抖动修正用磁铁部的抖动修正可动部；该抖动修正用驱动部利用由所述抖动修正用线圈部和所述抖动修正用磁铁部构成的抖动修正用音圈马达的驱动力，使所述抖动修正可动部在与光轴方向正交的平面内相对于所述抖动修正固定部摆动，从而进行抖动修正；The shake correction drive unit includes: a shake correction magnet unit disposed around the lens unit; a shake correction coil unit spaced apart from the shake correction magnet unit; and a shake correction support The shake correction fixed portion including the shake correction coil portion is supported by the shake correction movable portion including the shake correction magnet portion in a state of being spaced apart in the optical axis direction; the shake correction drive portion By using the driving force of the shake correction voice coil motor including the shake correction coil portion and the shake correction magnet portion, the shake correction movable portion is opposed to the plane in a plane orthogonal to the optical axis direction The shake correction fixing portion swings to perform shake correction;
    所述抖动修正可动部包含自动聚焦用驱动部，该自动聚焦用驱动部具有：自动聚焦用线圈部，配置在所述透镜部周围；自动聚焦用磁铁部，相对于所述自动聚焦用线圈部在径方向上间隔开配置；以及自动聚焦用支撑部，相对于包含所述自动聚焦用磁铁部的自动聚焦固定部，支撑包含所述自动聚焦用线圈部的自动聚焦可动部；该自动聚焦用驱动部利用由所述自动聚焦用线圈部和所述自动聚焦用磁铁部构成的自动聚焦用音圈马达的驱动力，使所述自动聚焦可动部沿光轴方向相对于所述自动聚焦固定部移动，从而自动进行对焦；The shake correction movable unit includes an autofocus drive unit including an autofocus coil unit disposed around the lens unit, and an autofocus magnet unit for the autofocus coil. a portion that is spaced apart in the radial direction; and an autofocus support portion that supports the autofocus movable portion including the autofocus coil portion with respect to the autofocus fixing portion including the autofocus magnet portion; The focus drive unit uses the driving force of the autofocus voice coil motor including the autofocus coil unit and the autofocus magnet unit to cause the autofocus movable portion to be relative to the automatic in the optical axis direction. Focusing the fixed part to move, thereby automatically focusing;
    所述抖动修正用支撑部具有双轴铰链结构，该双轴铰链结构由弹性体材料形成，且在与光轴正交的面内可移动地支撑所述抖动修正可动部；The shake correction support portion has a biaxial hinge structure formed of an elastomer material and movably supporting the shake correction movable portion in a plane orthogonal to the optical axis;
    所述自动聚焦用支撑部具有支撑部本体和补强部；The autofocus support portion has a support portion body and a reinforcing portion;
    所述支撑部本体具有：固定端，连接于所述自动聚焦固定部；自由端，连接于所述自动聚焦可动部；以及臂，连结所述固定端与所述自由端；The support body has a fixed end connected to the autofocus fixing portion, a free end connected to the autofocus movable portion, and an arm connecting the fixed end and the free end;
    所述臂由弹性体材料形成，并具有厚度形成为比周围薄且以与光轴方向正交的方向为轴的两个铰链部，并且伴随着所述自动聚焦可动部朝向光轴方向的移动，所述臂以所述两个铰链部处的弯曲方向彼此为相反方向的方式弯曲；The arm is formed of an elastomer material and has two hinge portions having a thickness formed to be thinner than the circumference and oriented in a direction orthogonal to the optical axis direction, and accompanied by the autofocus movable portion toward the optical axis direction Moving, the arm is curved in such a manner that the bending directions at the two hinge portions are opposite to each other;
    所述补强部由刚性比所述弹性体材料高的材料形成，且配置在所述臂的所述两个铰链部之间。 The reinforcing portion is formed of a material having a higher rigidity than the elastomer material, and is disposed between the two hinge portions of the arm.
  2. 根据权利要求1所述的透镜驱动装置，其特征在于，The lens driving device according to claim 1, wherein
    所述补强部由金属材料或者树脂材料形成。The reinforcing portion is formed of a metal material or a resin material.
  3. 根据权利要求1或2所述的透镜驱动装置，其特征在于，The lens driving device according to claim 1 or 2, wherein
    所述自动聚焦可动部具有位置检测部，该位置检测部配置在与所述臂的延伸方向交叉的面，根据磁场的变化检测该自动聚焦可动部的光轴方向的位置；The autofocus movable portion has a position detecting portion that is disposed on a surface that intersects with an extending direction of the arm, and detects a position of the autofocus movable portion in an optical axis direction according to a change in a magnetic field;
    所述自动聚焦固定部具有与所述位置检测部对置配置的位置检测用磁铁。The autofocus fixing portion has a position detecting magnet that is disposed to face the position detecting portion.
  4. 根据权利要求1至3中任意一项所述的透镜驱动装置，其特征在于，A lens driving device according to any one of claims 1 to 3, characterized in that
    具备介于所述自动聚焦固定部与所述固定端之间的阻尼部。A damper portion interposed between the autofocus fixing portion and the fixed end is provided.
  5. 一种摄像机模块，其特征在于，具备：A camera module characterized by comprising:
    透镜部；以及Lens portion;
    如权利要求1至4中任意一项所述的透镜驱动装置。A lens driving device according to any one of claims 1 to 4.
  6. 一种摄像机搭载装置，其为信息设备或者运输设备，其特征在于，A camera-mounted device, which is an information device or a transportation device, characterized in that
    具备如权利要求5所述的摄像机模块。 A camera module according to claim 5.
PCT/CN2016/084036 2016-05-31 2016-05-31 Lens driving apparatus, camera module, and camera holding apparatus WO2017206053A1 (en)

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KR1020187038012A KR102510364B1 (en) 2016-05-31 2016-05-31 Lens driving device, camera module, and camera mounting device
US16/306,049 US10802376B2 (en) 2016-05-31 2016-05-31 Lens driving device, camera module, and camera mounting device
JP2018555906A JP6853487B2 (en) 2016-05-31 2016-05-31 Lens drive, camera module, and camera mount
CN201680086205.3A CN109313373B (en) 2016-05-31 2016-05-31 Lens driving device, camera module, and camera mounting device
PCT/CN2016/084036 WO2017206053A1 (en) 2016-05-31 2016-05-31 Lens driving apparatus, camera module, and camera holding apparatus

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